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Postville, Iowa Weather

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

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

Postville, IA
Saturday, July 4 at 11:54 AM
80
°
Overcast
Feels like
88°
Humidity
71%
Wind
4 mph
Sunrise
12:32 AM
Sunset
3:48 PM
Postville, IA
Hour by hour · 24h
24-Hour ForecastPostville, IA: 24-hour forecast. Temperatures range from 67 to 83 degrees Fahrenheit with a 26% chance of precipitation at 6 AM.
L 67°H 83°
Postville, IA
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    25%
    0.02″
    83°67°—
  2. Sunday
    Jul 5
    Heavy Showers
    26%
    0.82″
    78°67°-5°
  3. Monday
    Jul 6
    Light Drizzle
    —
    —
    79°63°+1°
  4. Tuesday
    Jul 7
    Light Drizzle
    —
    —
    79°63°0°
  5. Wednesday
    Jul 8
    T-storm w/ Hail
    43%
    0.08″
    80°63°+1°
  6. Thursday
    Jul 9
    Drizzle
    45%
    —
    74°66°-6°
  7. Friday
    Jul 10
    Overcast
    —
    —
    77°62°+3°
Postville, IA
Next 24 hours · Mild now
62°75°88°6a12p6p12anow 78°high 83°low 67°PRECIP %
Postville, IA
Anemometer · 24h winds · from true
NESW
From · True
N
010° · backing 133°
Direction
N
010°
Sustained
4
mph
Gust
5
mph
Peak 24h
19
avg 5
Beaufort · 2 · LIGHT 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 19 @ 1:00p
010MPHB1B2B3B4-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 97SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Postville, IA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
974.5
+1.7 mb in 3h · rising · 28.78 inHg
Now
974.5
mb
3h
+1.7
mb
12h
+1.3
mb
24h
+0.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 972–975
965970975980-21h-18h-15h-12h-9h-6h-3h-24hNOW973.9971.6973.9
−24h−18h−12h−6hnow
The low is filling — pressure climbing out of storm territory.
Postville, IA
Air quality
40
AQI
Good
↑+9 in 6h

AQI 40 (Good), driven by PM2.5. AQI up 9 over the last 6 hours (gradual rise). PM2.5 at 10.3 µg/m³ (AQI 53) with a 0.76 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.

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

PM 2.5DRIVERGood
10.3μg/m³
PM 10Good
14μg/m³
NO₂Good
2μg/m³
OzoneModerate
77μg/m³
UV IndexModerate
4.7

What's driving it

Ozone × UV × Sky

Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

Present
AQI 36
UV peak
5.4 at 1 PM
Sky at peak
overcast
Projected peak
AQI 13

PM × Wind × Precip

PM2.5 at 10.3 µg/m³ (AQI 53) with a 0.76 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.76
Wind
calm
Recent rain
0h in last 6h
Pattern
stagnant smoke

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
Postville, IA
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
47.5mi
UNLIMITED
47 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
16:54 UTC · Postville, IA · 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
16:54 UTC · Postville, IA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Postville, IA
Satellite · infrared · animated
Postville, IA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Postville, IA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
4:58 AM
Sunrise
12:32 AM
Daylight
15h 16m
Sunset
3:48 PM
Civil dusk
9:25 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Postville, IA
The moon
Waning Gibbous
80% illuminated
Moonrise
11:05 PM
Moonset
10:09 AM
In sign
♓︎ Pisces
Postville, IA
Microseason
Jul 1–5

Cicadas claim the afternoon

bird
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Postville at a glance

  • Today vs. normal: 11°F above the seasonal normal for this latitude
  • Last frost: May 5 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 52162

16-Day Forecast — Postville

  1. Sat83°67°25%
  2. Sun78°67°26%
  3. Mon79°63°1%
  4. Tue79°63°5%
  5. Wed80°63°43%
  6. Thu74°66°45%
  7. Fri77°62°9%
  8. Sat81°60°9%
  9. Sun68°57°10%
  10. Mon74°53°8%
  11. Tue77°59°5%
  12. Wed76°61°16%
  13. Thu78°65°19%
  14. Fri82°66°26%
  15. Sat85°68°23%
  16. Sun84°70°32%

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 — Postville

SPC includes Postville in the general thunderstorm area today — no severe risk, but storms are possible.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

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: Winter settles deep on the plains.January 6–10: Arctic cold grips the heartland.January 11–15: Sunlight returns to the sloped terrain.January 16–20: Ring-necked pheasants call from cover.January 21–25: Deepest cold locks the prairie.January 26–31: Deep winter's pivot point.February 1–5: February's first breath.February 6–10: Subtle shifts in the light.February 11–15: Bald eagles concentrate on open water.February 16–20: Cold rebound before the final thaw.February 21–25: First killdeer return to thawed fields.February 26–28: Winter's veil grows thin.March 1–5: Ice withdraws from the land.March 6–10: Hibernators wake to open air.March 11–15: Spring arrives with fury and grace.March 16–20: Sandhill Cranes Rise from the Platte.March 21–25: Equinox — Night and Day Hold Balance.March 26–31: First Green Breaks Through Brown Earth.April 1–5: Thunder Voices Wake the Prairie.April 6–10: Cliff Swallows Return to Mud Nests.April 11–15: Wild Geese Wing North in Massive Flocks.April 16–20: Rainbows Follow Afternoon Storms.April 21–25: Prairie Sedges Push Through Wet Soil.April 26–30: Last Frost Retreats North.May 1–5: Wildflowers Erupt Across the Prairie.May 6–10: Grain Rains Feed the Growing Fields.May 11–15: Seedlings Rise From Frost-Free Soil.May 16–20: Roses Bloom Along the Shelter Rows.May 21–25: Summer Arrives Early in Wind and Heat.May 26–31: Frogs Begin Their Nightly Chorus.June 1–5: Prairie lightning bugs rise.June 6–10: Earthworms surface after rain.June 11–15: Toward the solstice glow.June 16–20: Lesser ripening, greater heat.June 21–25: Solstice—sun at zenith.June 26–30: Fireflies in the darkening oak.July 1–5: Cicadas claim the afternoon.July 6–10: Warm wind sweeps the tallgrass.July 11–15: Thunder builds every afternoon.July 16–20: Corn tassels and reaches peak.July 21–25: Dog days settle in haze.July 26–31: Katydid chorus erupts at dusk.August 1–5: Great rains sometimes fall.August 6–10: Autumn's edge approaches.August 11–15: Cool wind rises from the north.August 16–20: Late summer wind through tallgrass.August 21–25: Dew settles on the tallgrass.August 26–31: Monarchs gather on prairie.September 1–5: Corn tassels and heavy skies.September 6–10: Purple asters rise on the prairie.September 11–15: Hawks ride thermal currents south.September 16–20: Equinox brings balance to day.September 21–25: Thunder stills across the plains.September 26–30: Snow geese wheel through the flyway.October 1–5: Prairie enters dormancy slowly.October 6–10: Geese gather on autumn waters.October 11–15: First widespread freeze arrives.October 16–20: Oaks turn bronze and russet.October 21–25: Frost deepens through the night.October 26–31: Light rains fall on frozen ground.November 1–5: Tallgrass turns gold.November 6–10: North wind strips the oak.November 11–15: Frost locks the prairie.November 16–20: Open sky grows cold.November 21–25: First snow falls soft.November 26–30: Blizzard drives the herds.December 1–5: Deep winter takes hold.December 6–10: Sky closes cold, winter reigns.December 11–15: Darkness deepens, life retreats.December 16–20: Rivers turn to stone.December 21–25: Solstice — sun begins 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 afternoon

Millions of periodical and annual cicadas emerge, their droning chorus filling the summer heat; the soundtrack of midsummer settles over prairie and wetland.

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——
April——
Maylettuce, peas, spinach, radisheslettuce, peas, radishes
Junelettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
Augusttomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
October—winter squash, tomatoes (last)
November——
December——

A year in weather

July is Postville's warmest stretch (~72°F) and January its coldest (~17°F); precipitation crests in June at 5.9 inches and ebbs in January to 1.1 inches.

MonthMean tempPrecipRainy days
January17°1.1″4
February20°1.2″4
March33°2.1″5
April46°4.1″7
May58°5.0″9
June68°5.9″9
July72°4.5″7
August70°4.4″7
September62°4.0″7
October49°3.0″5
November35°2.1″4
December23°1.6″4

Regional context

Per NOAA NCEI 1991-2020 normals, Postville runs from a 17°F January mean to 72°F in July, a 55°F seasonal spread, with near 38.9 inches of precipitation across about 71 wet days.

Summer convection drives Postville's precipitation: June logs 5.9 inches on 9.0 rainy days, against January's 1.1 inches on 3.6 — warm-season storms carry Postville's moisture. That puts Postville in a summer-convective cohort with places like Castalia, IA, Luana, IA and Clermont, IA.

Postville reaches its last hard frost near late-May; that is the cue for kale, peas, spinach, and parsnips. Tomatoes and peppers do best set out two weeks later in Postville, once nights clear the mid-40s°F. The season ends by early-October in Postville, once hard frosts set back in. A creek-bottom lot in Postville can lag Postville's last frost 7-10 days behind a south slope.

Similar climates: Castalia, IA, Luana, IA, Clermont, IA, Monona, IA, Elgin, IA.

Frequently asked

When does it freeze in Postville?
Postville's last spring frost lands near mid-May, and in Postville the first fall frost follows around mid-October.
What is the rainy season in Postville?
June is the wettest month in Postville, about 5.9 inches on average; the year totals roughly 39 inches.
What is the warmest month in Postville?
July is Postville's warmest month, averaging about 72°F.
What is the coldest month in Postville?
Postville bottoms out in January, with a mean near 17°F.
When can I start a vegetable garden in Postville?
Postville's last frost (mid-May) cues hardy greens; in Postville, hold heat-lovers two weeks past.
How many rainy days does Postville get?
Postville records around 71 days of measurable precipitation annually.
What hardiness zone is Postville?
Postville's USDA zone comes from its January mean (17°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Postville?
Postville'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 Postville?
See this week's day-by-day rain chances for Postville in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Postville?
Current conditions for Postville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Postville forecast updated?
The Postville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Postville?
Today's sunrise and sunset times for Postville 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 Postville?
The next few days in Postville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Postville, Iowa has a warm-summer humid continental climate: January averages roughly 17°F, July about 72°F, 55°F between them.

Across the year, Postville collects about 39 inches of precipitation over roughly 71 days with measurable rain or snow.

Latitude 43.1°N gives Postville its 55°F swing, and with it the rhythm of Postville's growing season.

All cities in Iowa →

La Crosse, WI weather →

ZIP codes in Postville

  • 52162

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.