Cedar Rapids, IA Weather
Cedar Rapids hourly forecast: next 24 hours
Today's high of 70°F (21°C) is about 7°F (4°C) below the typical September high of 77°F (25°C).
Current conditions in detail
Cedar Rapids weather tomorrow (Thursday, September 17)
Tomorrow in Cedar Rapids looks fog, with a high of 81° and an overnight low of 65°. There is a 68% chance of rain - plan accordingly. Winds top out near 8 mph, and the UV index reaches 3 (moderate).
Cedar Rapids 14-day forecast
About the weather in Cedar Rapids
A 30°C spread between its warmest and coolest months puts Cedar Rapids among the more strongly seasonal places we cover. July averages 83°F (28°C) by day; January averages 29°F (-2°C), with nights at 14°F (-10°C).
Cedar Rapids weather: quick facts
- Hottest month: July - highs near 83°F (28°C)
- Coldest month: January - highs near 29°F (-2°C)
- Decade extremes (2015-2024): 100°F (38°C) high · -32°F (-36°C) low
- Wettest month: June (10 rainy days) · Sunniest: July (12.4 h sun/day)
- Climate type: humid continental
- Annual swing: 30°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 18 days a year
- Months with freezing average lows: 4
- Average humidity: 70%
Temperatures through the year
Overnight lows average at or below freezing for 4 months, December through March. July is the warm end of the year, averaging 83°F (28°C) by day and 66°F (19°C) overnight. January sits at the other end of the year: 29°F (-2°C) by day, 14°F (-10°C) at night. Sunshine averages 8.8 hours a day over the year, peaking in July at 12.4 hours.
Rain, sun and snow
Precipitation concentrates in June - 4.7 inches (118 mm) on 10 days - and thins out by February. Snow falls on roughly 18 days a year, mostly October through April. Between the average July and the average January lie 30°C, a wider spread than 96% of the 3496 cities in our dataset. The gridded 2015-2024 daily record for this location tops out at 100°F (38°C) and bottoms at -32°F (-36°C) - decade extremes, not all-time station records.
Season by season
Spring (March through May)
Spring in Cedar Rapids stays on the cool side of mild, with daytime highs averaging 59°F (15°C) and nights around 40°F (5°C); rain falls on around 33 of the 90 days, plus about 4 snowy days.
Summer (June through August)
Summer in Cedar Rapids brings hot afternoons, with daytime highs averaging 82°F (28°C) and nights around 64°F (18°C); rain falls on around 30 of the 90 days. Daylight is generous - around 11.9 hours of sun a day.
Fall (September through November)
Through fall, Cedar Rapids is crisp but comfortable: 62°F (17°C) by day, 46°F (8°C) after dark, and expect showers on roughly 25 days across the season.
Winter (December through February)
Winter in Cedar Rapids runs to hard cold, with daytime highs averaging 33°F (1°C) and nights around 17°F (-8°C); expect showers on roughly 22 days across the season, plus about 12 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Average temperatures in Cedar Rapids by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 29° | 14° | 8 | 1.9 in | 5.6 h/day | 77% |
| February | 33° | 15° | 6 | 1.5 in | 7.5 h/day | 71% |
| March | 48° | 30° | 9 | 2.8 in | 7.9 h/day | 67% |
| April | 59° | 39° | 11 | 3.8 in | 8.8 h/day | 64% |
| May | 71° | 52° | 12 | 4.5 in | 10.0 h/day | 69% |
| June | 81° | 63° | 10 | 4.7 in | 12.0 h/day | 68% |
| July | 83° | 66° | 10 | 3.3 in | 12.4 h/day | 75% |
| August | 81° | 64° | 10 | 3.6 in | 11.4 h/day | 74% |
| September | 77° | 59° | 9 | 3.6 in | 10.0 h/day | 71% |
| October | 62° | 46° | 10 | 3.7 in | 7.6 h/day | 67% |
| November | 48° | 32° | 7 | 2.7 in | 6.7 h/day | 70% |
| December | 37° | 23° | 7 | 2.2 in | 5.4 h/day | 72% |