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Shellsburg, Iowa Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

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

Shellsburg, IA
Saturday, July 4 at 8:31 PM
76
°
Mostly Clear
Feels like
83°
Humidity
84%
Wind
4 mph
Sunrise
12:37 AM
Sunset
3:46 PM
Shellsburg, IA
Hour by hour · 24h
24-Hour ForecastShellsburg, IA: 24-hour forecast. Temperatures range from 68 to 83 degrees Fahrenheit.
L 68°H 83°
Shellsburg, IA
7-day forecast
  1. Today
    Jul 4
    Heavy Rain
    71%
    1.2″
    83°67°—
  2. Sunday
    Jul 5
    Overcast
    —
    —
    83°68°0°
  3. Monday
    Jul 6
    Overcast
    —
    —
    81°66°-2°
  4. Tuesday
    Jul 7
    Light Drizzle
    —
    —
    82°64°+1°
  5. Wednesday
    Jul 8
    T-storm w/ Hail
    40%
    —
    84°66°+2°
  6. Thursday
    Jul 9
    Drizzle
    49%
    0.01″
    74°64°-10°
  7. Friday
    Jul 10
    Overcast
    13%
    —
    79°65°+5°
Shellsburg, IA
Next 24 hours · Mild now
64°76°88°6p12a6a12pnow 77°high 83°low 68°
Shellsburg, IA
Anemometer · 24h winds · from true
NESW
From · True
NNW
329° · backing 98°
Direction
NNW
329°
Sustained
4
mph
Gust
6
mph
Peak 24h
30
avg 7
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 7 · pk 30 @ 6:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 158SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Shellsburg, IA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
985.5
-0.7 mb in 3h · falling · 29.10 inHg
Now
985.5
mb
3h
-0.7
mb
12h
+1.0
mb
24h
-0.6
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 984–988
9809859909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW988.4984.0985.7
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Shellsburg, IA
Air quality
41
AQI
Good
↑+11 in 6h

AQI 41 (Good), driven by Ozone. AQI up 11 over the last 6 hours (gradual rise). Ozone at AQI 40. Overcast through the UV peak window (cloud cover ~86%) — afternoon ozone should stay flat.

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

PM 2.5Good
3.6μg/m³
PM 10Good
4μg/m³
NO₂Good
3μg/m³
OzoneDRIVERModerate
84μg/m³
UV IndexLow
0.1

What's driving it

Ozone × UV × Sky

Ozone at AQI 40. Overcast through the UV peak window (cloud cover ~86%) — afternoon ozone should stay flat.

Present
AQI 40
UV peak
0.1 at 1 PM
Sky at peak
overcast
Projected peak
AQI 5

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 TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Shellsburg, IA
Sky cover · visibility · 24h
Cloud cover
26%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
34.0mi
UNLIMITED
53 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
01:31 UTC · Shellsburg, 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
01:31 UTC · Shellsburg, IA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Shellsburg, IA
Satellite · infrared · animated
Shellsburg, IA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Shellsburg, IA
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:03 AM
Sunrise
12:37 AM
Daylight
15h 09m
Sunset
3:46 PM
Civil dusk
9:22 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Shellsburg, IA
The moon
Waning Gibbous
77% illuminated
Moonrise
11:27 PM
Moonset
11:19 AM
In sign
♓︎ Pisces
Shellsburg, IA
Microseason
Jul 1–5

Cicadas claim the afternoon

weather
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Shellsburg at a glance

  • Today vs. normal: 6°F above the seasonal normal for this latitude
  • Last frost: April 29 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 52332

16-Day Forecast — Shellsburg

  1. Sat83°67°71%
  2. Sun83°66°7%
  3. Mon81°66°4%
  4. Tue82°64°4%
  5. Wed84°66°40%
  6. Thu74°64°49%
  7. Fri79°65°13%
  8. Sat76°63°8%
  9. Sun76°55°7%
  10. Mon80°59°6%
  11. Tue85°68°3%
  12. Wed80°66°26%
  13. Thu86°69°19%
  14. Fri87°74°20%
  15. Sat88°75°20%
  16. Sun82°62°24%

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

Right now in the garden

Peak growing season

As of July 5, 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 — Shellsburg

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

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3NONENo severe risk

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 186 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

Shellsburg peaks at about 73°F in July and bottoms near 20°F in January; June brings the heaviest rain (5.6 inches) and January the least (0.9 inches).

MonthMean tempPrecipRainy days
January20°0.9″3
February24°1.2″3
March37°2.0″5
April49°3.6″7
May60°4.3″8
June70°5.6″9
July73°4.4″6
August71°4.1″6
September63°3.4″6
October51°2.9″5
November37°2.0″4
December25°1.6″4

Frequently asked

When does it freeze in Shellsburg?
Shellsburg's last spring frost lands near mid-May, and in Shellsburg the first fall frost follows around mid-October.
What is the rainy season in Shellsburg?
Shellsburg sees its heaviest rain in June (around 5.6 inches), part of roughly 36 inches a year.
What is the warmest month in Shellsburg?
Shellsburg peaks in July, when the mean runs near 73°F.
What is the coldest month in Shellsburg?
January is Shellsburg's coldest month, averaging about 20°F.
When can I start a vegetable garden in Shellsburg?
In Shellsburg, sow peas and hardy greens around mid-May; Shellsburg's tomatoes and peppers wait two weeks more.
How many rainy days does Shellsburg get?
Shellsburg averages about 67 days with measurable rain or snow each year.
What hardiness zone is Shellsburg?
Since January in Shellsburg averages 20°F, Shellsburg's USDA zone follows that floor — confirm it by ZIP.
What is the 10-day forecast for Shellsburg?
Shellsburg'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 Shellsburg?
See this week's day-by-day rain chances for Shellsburg in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Shellsburg?
Current conditions for Shellsburg and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Shellsburg forecast updated?
The Shellsburg forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Shellsburg?
Today's sunrise and sunset times for Shellsburg 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 Shellsburg?
The next few days in Shellsburg's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

The warm-summer humid continental climate of Shellsburg, Iowa carries typical Januarys near 20°F and Julys around 73°F — 53°F of seasonal travel.

In a typical year Shellsburg records about 36 inches of precipitation on around 67 days.

Shellsburg sits at 42.1°N; that 53°F seasonal swing frames planting windows and frost dates across Shellsburg.

All cities in Iowa →

Cedar Rapids, IA weather →

ZIP codes in Shellsburg

  • 52332

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.