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Weather & Climate in Williamsburg, IA

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Williamsburg experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 19°F in January while summers reach 73°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 36.0 inches. The area receives 27.9 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 762 feet.

Temperature

19°F Jan (-7°C) 73°F Jul (23°C)
Annual Average48.2°F
11% below US avg
January Average19°F (-7°C)
July Average73°F (23°C)
Sunny Days275 days/yr

Geography

Elevation762 ft (232 m)
Area3.4 sq mi (8.7 km²)
Population Density993/sq mi
Coordinates41.6689°N, 92.0132°W
TimezoneAmerica/Chicago
CountyIowa County County
Nearest AirportThe Eastern Iowa (CID)
23 miles away

Precipitation & Snow

Annual Rainfall 36.0"
5% below US avg
Snowfall 27.9"
Wettest Month (Jun) 4.61"
Driest Month (Feb) 0.94"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score28.2 / 100
Social Vulnerability19.4 / 100
Community Resilience94.1 / 100

Hazard Breakdown

Tornado Relatively Low
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Very Low
Hail Relatively Moderate
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 Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Tornado History

624 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 11 fatalities, 360 injuries.

Date Rating Distance Path Fatalities
Mar 31, 2023 EF4 40 km 19.9 mi 0
Mar 13, 1990 EF4 79 km 19.0 mi 0
Aug 12, 1974 EF4 88 km 5.0 mi 0
Aug 12, 1974 EF4 17 km 2.0 mi 0
Aug 26, 1965 EF4 72 km 4.7 mi 1
Apr 11, 1965 EF4 92 km 91.5 mi 1
Apr 30, 1954 EF4 53 km 80.4 mi 0
Mar 31, 2023 EF3 73 km 26.1 mi 0
Jul 19, 2018 EF3 96 km 8.4 mi 0
Jul 19, 2018 EF3 80 km 9.2 mi 0
Jun 1, 2007 EF3 82 km 15.8 mi 0
May 21, 2004 EF3 45 km 3.0 mi 0
May 15, 1998 EF3 49 km 47.0 mi 0
May 9, 1995 EF3 96 km 10.0 mi 0
Jun 19, 1993 EF3 93 km 9.0 mi 0
Jul 13, 1992 EF3 93 km 5.0 mi 0
May 4, 1977 EF3 73 km 17.8 mi 0
Nov 9, 1975 EF3 70 km 39.4 mi 0
Jul 12, 1971 EF3 81 km 0.1 mi 0
May 31, 1971 EF3 54 km 9.4 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Wildfire History

9 wildfires (100+ acres) recorded within 100 km. Largest: UNIT 3 (1,206 acres, 1999).

Year Name Acres Burned Distance
1999 UNIT 3 1,206 99 km
2002 HSB 03 2 1,130 98 km
2009 UNNAMED 939 30 km
2010 FOLEY 786 27 km
2000 DESTRUST A 756 98 km
2011 ACE AUTO 676 19 km
2006 HSB 003 674 99 km
2004 HSB 009 608 98 km
2011 IRCP WUI ROFAE #2 FY11 510 36 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 19°F (-7°C) 1.0 in Coldest
February 25°F (-4°C) 0.9 in Driest
March 37°F (3°C) 2.2 in
April 50°F (10°C) 3.6 in
May 61°F (16°C) 4.1 in
June 71°F (21°C) 4.6 in Wettest
July 73°F (23°C) 4.3 in Warmest
August 72°F (22°C) 4.5 in
September 64°F (18°C) 4.0 in
October 52°F (11°C) 2.7 in
November 37°F (3°C) 2.3 in
December 24°F (-4°C) 1.4 in

Williamsburg has a seasonal temperature swing of 54°F / from 19°F in January to 73°F in July. Total annual precipitation is 35.7 inches, with June being the wettest month (4.6") and February the driest (0.9").

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