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Weather & Climate in Clarence, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Clarence experiences four distinct seasons with an average annual temperature of 49°F (10°C). Winters average 20°F in January while summers reach 74°F in July. The area gets 275 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 36.5 inches. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 852 feet.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 49.3°F |
| 9% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 852 ft (260 m) |
| Area | 0.7 sq mi (1.8 km²) |
| Population Density | 1,609/sq mi |
| Coordinates | 41.8858°N, 91.0579°W |
| Timezone | America/Chicago |
| County | Cedar County County |
| Nearest Airport | Monticello Regional (MXO) 24 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 21.5 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 91.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Sep 2, 1999 | 8 km W of Amboy, Illinois | M3.5 | 136 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
669 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 5 fatalities, 274 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 13, 1990 | EF4 | 49 km | 19.0 mi | 0 |
| Mar 29, 1981 | EF4 | 95 km | 5.1 mi | 0 |
| Aug 12, 1974 | EF4 | 62 km | 5.0 mi | 0 |
| Aug 12, 1974 | EF4 | 94 km | 2.0 mi | 0 |
| Apr 11, 1965 | EF4 | 11 km | 91.5 mi | 1 |
| Apr 30, 1954 | EF4 | 62 km | 80.4 mi | 0 |
| Jun 1, 2007 | EF3 | 69 km | 15.8 mi | 0 |
| May 21, 2004 | EF3 | 66 km | 3.0 mi | 0 |
| May 15, 1998 | EF3 | 88 km | 47.0 mi | 0 |
| Jul 27, 1995 | EF3 | 95 km | 20.0 mi | 0 |
| May 9, 1995 | EF3 | 37 km | 10.0 mi | 0 |
| Jun 19, 1993 | EF3 | 56 km | 14.0 mi | 0 |
| Jun 19, 1993 | EF3 | 71 km | 9.0 mi | 0 |
| Jul 13, 1992 | EF3 | 33 km | 5.0 mi | 0 |
| Mar 13, 1990 | EF3 | 72 km | 15.5 mi | 0 |
| May 8, 1988 | EF3 | 28 km | 32.0 mi | 0 |
| Aug 15, 1978 | EF3 | 72 km | 6.4 mi | 0 |
| Jun 20, 1974 | EF3 | 66 km | 10.6 mi | 1 |
| Jun 14, 1974 | EF3 | 65 km | 48.6 mi | 0 |
| May 13, 1974 | EF3 | 48 km | 3.6 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
8 wildfires (100+ acres) recorded within 100 km. Largest: UNIT 3 (1,206 acres, 1999).
| Year | Name | Acres Burned | Distance |
| 1999 | UNIT 3 | 1,206 | 86 km |
| 2002 | HSB 03 2 | 1,130 | 86 km |
| 2009 | UNNAMED | 939 | 100 km |
| 2010 | FOLEY | 786 | 97 km |
| 2000 | DESTRUST A | 756 | 85 km |
| 2011 | ACE AUTO | 676 | 87 km |
| 2006 | HSB 003 | 674 | 87 km |
| 2004 | HSB 009 | 608 | 85 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.2 in | Coldest, Driest |
| February | 24°F (-4°C) | 1.2 in | |
| March | 36°F (2°C) | 2.4 in | |
| April | 49°F (9°C) | 3.5 in | |
| May | 61°F (16°C) | 4.0 in | |
| June | 70°F (21°C) | 4.5 in | Wettest |
| July | 74°F (23°C) | 4.2 in | Warmest |
| August | 71°F (22°C) | 4.3 in | |
| September | 63°F (17°C) | 4.1 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 37°F (3°C) | 2.4 in | |
| December | 24°F (-4°C) | 1.9 in |
Clarence has a seasonal temperature swing of 54°F / from 20°F in January to 74°F in July. Total annual precipitation is 36.2 inches, with June being the wettest month (4.5") and January the driest (1.2").