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Weather & Climate in Arthur, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Arthur 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 260 sunny days per year, above the national average. Annual precipitation totals 33.6 inches. The area receives 34.5 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 1,299 feet.
Temperature
19°F Jan (-7°C)
73°F Jul (23°C)
| Annual Average | 47.5°F |
| 12% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,299 ft (396 m) |
| Area | 0.2 sq mi (0.4 km²) |
| Population Density | 1,967/sq mi |
| Coordinates | 42.3354°N, 95.3469°W |
| Timezone | America/Chicago |
| County | Ida County County |
| Nearest Airport | Sioux Gateway/Brig General Bud Day Field (SUX) 53 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.4 / 100 |
| Social Vulnerability | 33.0 / 100 |
| Community Resilience | 94.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively 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: M2.7.
| Jun 30, 2021 | 4 km E of Rembrandt, Iowa | M2.7 | 58 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
570 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 12 fatalities, 190 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Oct 4, 2013 | EF4 | 63 km | 24.7 mi | 0 |
| Apr 9, 2011 | EF4 | 60 km | 3.2 mi | 0 |
| May 27, 1995 | EF4 | 84 km | 30.0 mi | 0 |
| May 27, 1995 | EF4 | 47 km | 36.0 mi | 0 |
| Jun 28, 1979 | EF4 | 70 km | 14.9 mi | 3 |
| Jun 8, 1967 | EF4 | 98 km | 2.0 mi | 0 |
| May 5, 1965 | EF4 | 72 km | 9.9 mi | 0 |
| Jun 9, 1954 | EF4 | 52 km | 9.9 mi | 1 |
| Jun 23, 1952 | EF4 | 62 km | 24.1 mi | 0 |
| Jul 14, 2021 | EF3 | 47 km | 10.8 mi | 0 |
| Apr 9, 2011 | EF3 | 6 km | 10.1 mi | 0 |
| Apr 9, 2011 | EF3 | 27 km | 29.4 mi | 0 |
| Apr 9, 2011 | EF3 | 45 km | 3.4 mi | 0 |
| Jun 11, 2008 | EF3 | 87 km | 14.2 mi | 4 |
| Jun 11, 2004 | EF3 | 68 km | 6.1 mi | 0 |
| May 16, 1999 | EF3 | 91 km | 6.2 mi | 0 |
| May 16, 1999 | EF3 | 93 km | 7.5 mi | 2 |
| Jul 5, 1994 | EF3 | 78 km | 1.8 mi | 0 |
| Jun 16, 1992 | EF3 | 85 km | 26.0 mi | 0 |
| Apr 26, 1991 | EF3 | 35 km | 7.7 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 0.6 in | Coldest, Driest |
| February | 24°F (-5°C) | 0.8 in | |
| March | 35°F (2°C) | 2.1 in | |
| April | 48°F (9°C) | 2.9 in | |
| May | 60°F (16°C) | 4.2 in | |
| June | 70°F (21°C) | 4.7 in | Wettest |
| July | 73°F (23°C) | 3.8 in | Warmest |
| August | 71°F (22°C) | 4.0 in | |
| September | 63°F (17°C) | 3.4 in | |
| October | 51°F (10°C) | 2.4 in | |
| November | 35°F (1°C) | 1.3 in | |
| December | 22°F (-6°C) | 0.9 in |
Arthur has a seasonal temperature swing of 55°F / from 19°F in January to 73°F in July. Total annual precipitation is 31.0 inches, with June being the wettest month (4.7") and January the driest (0.6").