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Old Jamestown, Missouri Weather

Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →

Old Jamestown weather forecast — hour by hour, 7-day outlook, NOAA radar

Old Jamestown, MO
Saturday, July 4 at 1:07 PM
89
°
Overcast
Feels like
95°
Humidity
61%
Wind
9 mph
Sunrise
12:41 AM
Sunset
3:29 PM
Old Jamestown, MO
Hour by hour · 24h
24-Hour ForecastOld Jamestown, MO: 24-hour forecast. Temperatures range from 70 to 92 degrees Fahrenheit with a 23% chance of precipitation at 11 AM.
L 70°H 92°
Old Jamestown, MO
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    18%
    —
    92°76°—
  2. Sunday
    Jul 5
    Rain
    27%
    0.17″
    81°70°-11°
  3. Monday
    Jul 6
    Clear
    26%
    —
    83°67°+2°
  4. Tuesday
    Jul 7
    Clear
    —
    —
    83°63°0°
  5. Wednesday
    Jul 8
    Partly Cloudy
    10%
    —
    94°67°+11°
  6. Thursday
    Jul 9
    Overcast
    34%
    —
    96°78°+2°
  7. Friday
    Jul 10
    Light Drizzle
    45%
    —
    93°74°-3°
Old Jamestown, MO
Next 24 hours · Warm now
HOT 90°60°80°100°12p6p12a6anow 89°high 92°low 70°PRECIP %
Old Jamestown, MO
Anemometer · 24h winds · from true
NESW
From · True
WSW
250° · veering 56°
Direction
WSW
250°
Sustained
9
mph
Gust
12
mph
Peak 24h
15
avg 5
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 5 · pk 15 @ 2:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 226SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 56° from the wsw.
Old Jamestown, MO
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
995.4
-1.1 mb in 3h · falling · 29.39 inHg
Now
995.4
mb
3h
-1.1
mb
12h
-1.0
mb
24h
-2.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 995–998
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW997.9995.2995.4
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Old Jamestown, MO
Air quality
48
AQI
Good
→-1 in 6h

AQI 48 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.9 µg/m³, PM10 at 13.1 µg/m³ — typical background levels with no transport signature.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
11.9μg/m³
PM 10Good
13μg/m³
NO₂Good
3μg/m³
OzoneUnhealthy SG
107μg/m³
UV IndexHigh
5.7

What's driving it

Ozone × UV × Sky

Ozone at AQI 50 now. With UV 5.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 27 around 1 PM.

Present
AQI 50
UV peak
5.7 at 1 PM
Sky at peak
partly cloudy
Projected peak
AQI 27

PM × Wind × Precip

PM2.5 at 11.9 µg/m³, PM10 at 13.1 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.91
Wind
light
Recent rain
0h in last 6h
Pattern
background

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³330
Old Jamestown, MO
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
59.9mi
UNLIMITED
70 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
18:07 UTC · Old Jamestown, MO · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
18:07 UTC · Old Jamestown, MO · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Old Jamestown, MO
Satellite · infrared · animated
Old Jamestown, MO
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Old Jamestown, MO
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:10 AM
Sunrise
12:41 AM
Daylight
14h 48m
Sunset
3:29 PM
Civil dusk
9:02 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Old Jamestown, MO
The moon
Waning Gibbous
80% illuminated
Moonrise
10:54 PM
Moonset
10:08 AM
In sign
♓︎ Pisces
Old Jamestown, MO
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Old Jamestown at a glance

  • Today vs. normal: 16°F above the seasonal normal for this latitude
  • Last frost: April 9 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Old Jamestown

  1. Sat92°76°18%
  2. Sun81°70°27%
  3. Mon83°67°26%
  4. Tue83°63°5%
  5. Wed94°67°10%
  6. Thu96°78°34%
  7. Fri93°74°45%
  8. Sat79°65°23%
  9. Sun79°60°6%
  10. Mon81°59°6%
  11. Tue79°59°10%
  12. Wed86°60°13%
  13. Thu91°67°13%
  14. Fri94°73°19%
  15. Sat82°68°17%
  16. Sun78°68°14%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Old Jamestown

SPC has placed Old Jamestown in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its Return.December 26–31: The Year Turns in Silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the scorching afternoon

Dog-day cicadas emerge in waves, their rasp dominating every sunny hour; heat peaks above 90 degrees daily.

Day 185 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

Old Jamestown's warmest month is July (~81°F mean) and its coldest is January (~31°F). Rainfall peaks in May (4.4 inches) and bottoms out in January (2.1 inches).

MonthMean tempPrecipRainy days
January31°2.1″13
February35°2.3″12
March45°4.0″16
April57°4.3″15
May66°4.4″17
June75°4.2″15
July81°2.7″13
August80°2.9″13
September72°2.6″11
October60°2.8″11
November45°3.6″13
December34°3.0″12

Regional context

Old Jamestown's climate, from NOAA NCEI 1991-2020 station normals, pairs 31°F Januarys with 81°F Julys — a 50°F swing. About 39.1 inches of precipitation falls over roughly 161 days a year.

Rainfall in Old Jamestown stays even across the calendar: May tops out at 4.4 inches over 17.2 rainy days, and January still logs 2.1 inches across 12.7 — a narrow range for Old Jamestown. That lines Old Jamestown up with places like Black Jack, MO, Florissant, MO and West Alton, MO, fed by overlapping storm tracks.

The cool-season window in Old Jamestown starts at mid-April, when nights stop freezing — think peas, lettuce, spinach, and radishes. Warm-soil crops in Old Jamestown wait about two weeks past Old Jamestown's last frost, once the soil warms. Old Jamestown's window closes around mid-November as overnight lows return below freezing. Within Old Jamestown, cold-air pooling chills low spots by 5-10°F, shifting Old Jamestown's local frost dates.

Similar climates: Black Jack, MO, Florissant, MO, West Alton, MO, Calverton Park, MO, Spanish Lake, MO.

Frequently asked

When does it freeze in Old Jamestown?
Frost typically leaves Old Jamestown by mid-April and returns to Old Jamestown near mid-November.
What is the rainy season in Old Jamestown?
Rainfall in Old Jamestown peaks in May near 4.4 inches, out of about 39 inches annually.
What is the warmest month in Old Jamestown?
On average July tops the year in Old Jamestown at about 81°F.
What is the coldest month in Old Jamestown?
The coldest stretch in Old Jamestown falls in January, around 31°F on average.
When can I start a vegetable garden in Old Jamestown?
Hardy spring crops go in near mid-April in Old Jamestown; tender peppers and squash wait 10–14 days.
How many rainy days does Old Jamestown get?
Old Jamestown records around 161 days of measurable precipitation annually.
What hardiness zone is Old Jamestown?
Because Old Jamestown bottoms near 31°F in January, that winter low sets Old Jamestown's USDA zone — verify by ZIP.
What is the 10-day forecast for Old Jamestown?
Old Jamestown's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Old Jamestown?
See this week's day-by-day rain chances for Old Jamestown in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Old Jamestown?
Current conditions for Old Jamestown and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Old Jamestown forecast updated?
The Old Jamestown forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Old Jamestown?
Today's sunrise and sunset times for Old Jamestown are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Old Jamestown?
The next few days in Old Jamestown's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

In Old Jamestown, Missouri, the humid subtropical climate runs from about 31°F in January to 81°F in July, a 50°F seasonal range.

Across the year, Old Jamestown collects about 39 inches of precipitation over roughly 161 days with measurable rain or snow.

Old Jamestown's 50°F range, set by its 38.8°N position, drives frost timing and what thrives in Old Jamestown.

All cities in Missouri →

St. Louis, MO weather →

ZIP codes in Old Jamestown

  • 63034

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.