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West Alton, Missouri Weather

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

West Alton weather forecast — hour by hour, 7-day outlook, NOAA radar

West Alton, MO
Saturday, July 4 at 12:07 PM
91
°
Clear
Feels like
99°
Humidity
52%
Wind
10 mph
Sunrise
12:41 AM
Sunset
3:29 PM
West Alton, MO
Hour by hour · 24h
24-Hour ForecastWest Alton, MO: 24-hour forecast. Temperatures range from 72 to 94 degrees Fahrenheit with a 24% chance of precipitation at 11 AM.
L 72°H 94°
West Alton, MO
7-day forecast
  1. Today
    Jul 4
    Overcast
    19%
    —
    94°76°—
  2. Sunday
    Jul 5
    Heavy Rain
    24%
    0.41″
    81°72°-13°
  3. Monday
    Jul 6
    Overcast
    24%
    —
    87°70°+6°
  4. Tuesday
    Jul 7
    Overcast
    —
    —
    85°67°-2°
  5. Wednesday
    Jul 8
    Overcast
    10%
    —
    91°67°+6°
  6. Thursday
    Jul 9
    Overcast
    34%
    —
    95°75°+4°
  7. Friday
    Jul 10
    Drizzle
    45%
    0.04″
    89°73°-6°
West Alton, MO
Next 24 hours · Hot now
HOT 90°65°83°100°12p6p12a6anow 91°high 94°low 72°PRECIP %
West Alton, MO
Anemometer · 24h winds · from true
NESW
From · True
WSW
255° · veering 33°
Direction
WSW
255°
Sustained
10
mph
Gust
14
mph
Peak 24h
17
avg 6
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 6 · pk 17 @ 2:00p
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2410SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 33° from the wsw.
West Alton, MO
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1001.0
+0.2 mb in 3h · steady · 29.56 inHg
Now
1001.0
mb
3h
+0.2
mb
12h
-0.4
mb
24h
-2.2
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1000–1003
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1003.2999.71001.0
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
West Alton, 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 12.5 µg/m³, PM10 at 13.6 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 2.5DRIVERModerate
12.5μg/m³
PM 10Good
14μg/m³
NO₂Good
3μg/m³
OzoneUnhealthy SG
106μg/m³
UV IndexHigh
5.7

What's driving it

Ozone × UV × Sky

Ozone at AQI 50 now. With UV 5.9 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 28 around 1 PM.

Present
AQI 50
UV peak
5.9 at 1 PM
Sky at peak
partly cloudy
Projected peak
AQI 28

PM × Wind × Precip

PM2.5 at 12.5 µg/m³, PM10 at 13.6 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.92
Wind
breezy
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
West Alton, MO
Sky cover · visibility · 24h
Cloud cover
19%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
75.6mi
UNLIMITED
77 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
17:07 UTC · West Alton, 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
17:07 UTC · West Alton, MO · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
West Alton, MO
Satellite · infrared · animated
West Alton, MO
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
West Alton, 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.
West Alton, MO
The moon
Waning Gibbous
80% illuminated
Moonrise
10:54 PM
Moonset
10:08 AM
In sign
♓︎ Pisces
West Alton, MO
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

West Alton at a glance

  • Today vs. normal: 18°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.

ZIP code: 63386

16-Day Forecast — West Alton

  1. Sat94°76°19%
  2. Sun81°72°24%
  3. Mon87°70°24%
  4. Tue85°67°6%
  5. Wed91°67°10%
  6. Thu95°75°34%
  7. Fri89°73°45%
  8. Sat88°73°25%
  9. Sun78°63°6%
  10. Mon78°59°6%
  11. Tue79°61°10%
  12. Wed83°65°13%
  13. Thu83°66°13%
  14. Fri82°69°16%
  15. Sat87°70°23%
  16. Sun91°74°16%

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 — West Alton

SPC has placed West Alton 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

July is West Alton's warmest stretch (~81°F) and January its coldest (~31°F); precipitation crests in May at 4.4 inches and ebbs in January to 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

Frequently asked

When does it freeze in West Alton?
In West Alton, expect the last spring frost near mid-April; West Alton's first autumn frost comes around mid-November.
What is the rainy season in West Alton?
West Alton sees its heaviest rain in May (around 4.4 inches), part of roughly 39 inches a year.
What is the warmest month in West Alton?
On average July tops the year in West Alton at about 81°F.
What is the coldest month in West Alton?
The coldest stretch in West Alton falls in January, around 31°F on average.
When can I start a vegetable garden in West Alton?
In West Alton, sow peas and hardy greens around mid-April; West Alton's tomatoes and peppers wait two weeks more.
How many rainy days does West Alton get?
Expect roughly 161 wet days a year in West Alton.
What hardiness zone is West Alton?
Because West Alton bottoms near 31°F in January, that winter low sets West Alton's USDA zone — verify by ZIP.
What is the 10-day forecast for West Alton?
West Alton'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 West Alton?
See this week's day-by-day rain chances for West Alton in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in West Alton?
Current conditions for West Alton and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the West Alton forecast updated?
The West Alton forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in West Alton?
Today's sunrise and sunset times for West Alton 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 West Alton?
The next few days in West Alton's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Set in a humid subtropical zone, West Alton, Missouri swings from 31°F in the heart of winter to 81°F at midsummer — a 50°F arc.

Rain and snow bring West Alton roughly 39 inches a year across approximately 161 measurable-precipitation days.

West Alton sits at 38.9°N; that 50°F seasonal swing frames planting windows and frost dates across West Alton.

All cities in Missouri →

Alton, IL weather →

ZIP codes in West Alton

  • 63386

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.