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Weather & Climate in Derby, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Derby experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 28°F in January while summers reach 73°F in July. The area gets 293 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 40.8 inches. The area receives 18.3 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 908 feet.
Temperature
28°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 908 ft (277 m) |
| Area | 1.3 sq mi (3.4 km²) |
| Population Density | 326/sq mi |
| Coordinates | 39.7640°N, 83.2068°W |
| Timezone | America/New_York |
| County | Pickaway County County |
| Nearest Airport | Rickenbacker International (LCK) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 50.9 / 100 |
| Social Vulnerability | 26.3 / 100 |
| Community Resilience | 74.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
23 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Feb 19, 1995 | 8 km SSE of Rocky Fork Point, Ohio | M3.6 | 75 km | 10 km |
| Nov 20, 2013 | 2 km SW of Buchtel, Ohio | M3.5 | 93 km | 8 km |
| Apr 24, 2009 | 7 km ENE of Rio Grande, Ohio | M3.4 | 124 km | 8 km |
| May 24, 2017 | 1 km S of McArthur, Ohio | M3.4 | 86 km | 10 km |
| Apr 24, 2025 | 3 km S of Pleasant City, Ohio | M3.1 | 142 km | 6 km |
| Apr 22, 2025 | 3 km ESE of Buffalo, Ohio | M3.1 | 148 km | 5 km |
| Feb 3, 2025 | 2 km NNW of Oak Hill, Ohio | M3.1 | 108 km | 26 km |
| Apr 25, 2020 | 2 km SE of South Shore, Kentucky | M2.9 | 120 km | 27 km |
| May 9, 2025 | 3 km S of Pleasant City, Ohio | M2.9 | 143 km | 5 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 124 km | 5 km |
| Mar 17, 1999 | 2 km NNE of Ripley, Ohio | M2.8 | 124 km | 0 km |
| May 6, 2002 | 3 km SE of Racine, Ohio | M2.8 | 145 km | 5 km |
| Apr 29, 2025 | 1 km SE of Pleasant City, Ohio | M2.8 | 144 km | 2 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 131 km | 5 km |
| May 11, 2015 | 5 km ESE of Maysville, Kentucky | M2.6 | 133 km | 11 km |
| Feb 11, 2015 | 8 km SE of Richmond Dale, Ohio | M2.6 | 79 km | 20 km |
| Mar 8, 2016 | 0 km N of Thurman, Ohio | M2.6 | 116 km | 20 km |
| Jul 23, 2013 | 6 km NNE of Germantown, Kentucky | M2.6 | 134 km | 4 km |
| Jan 28, 2024 | 3 km SW of Old Washington, Kentucky | M2.5 | 141 km | 15 km |
| Mar 20, 2023 | 13 km SSW of Rio Grande, Ohio | M2.5 | 132 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
436 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 49 fatalities, 1,671 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 3, 1974 | EF5 | 74 km | 31.3 mi | 36 |
| Sep 20, 2000 | EF4 | 67 km | 9.0 mi | 1 |
| May 27, 2019 | EF3 | 77 km | 9.9 mi | 0 |
| May 14, 2014 | EF3 | 56 km | 8.9 mi | 0 |
| Nov 10, 2002 | EF3 | 71 km | 9.0 mi | 0 |
| Oct 13, 1999 | EF3 | 27 km | 3.6 mi | 0 |
| Jun 30, 1993 | EF3 | 72 km | 15.0 mi | 0 |
| May 31, 1985 | EF3 | 61 km | 29.0 mi | 1 |
| Jun 13, 1981 | EF3 | 86 km | 3.8 mi | 4 |
| May 10, 1973 | EF3 | 74 km | 89.6 mi | 0 |
| Feb 22, 1971 | EF3 | 33 km | 6.8 mi | 0 |
| Sep 3, 1970 | EF3 | 24 km | 2.3 mi | 0 |
| May 8, 1969 | EF3 | 80 km | 1.9 mi | 0 |
| Nov 16, 1965 | EF3 | 38 km | 3.8 mi | 0 |
| Feb 10, 1959 | EF3 | 87 km | 10.5 mi | 0 |
| Jun 5, 2024 | EF2 | 99 km | 1.3 mi | 0 |
| Apr 2, 2024 | EF2 | 86 km | 1.9 mi | 0 |
| Mar 14, 2024 | EF2 | 73 km | 19.5 mi | 0 |
| Feb 28, 2024 | EF2 | 51 km | 21.1 mi | 0 |
| Feb 28, 2024 | EF2 | 44 km | 14.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
4 wildfires (100+ acres) recorded within 100 km. Largest: LONG RIDGE RX UNIT 37-38 (1,050 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | LONG RIDGE RX UNIT 37-38 | 1,050 | 97 km |
| 2021 | LONG RIDGE RX UNIT 1-12 | 1,037 | 93 km |
| 2022 | LONG RIDGE RX UNIT 11-19 | 936 | 92 km |
| 2022 | LONG RIDGE RX UNIT 24 | 709 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.2 in | Coldest, Driest |
| February | 30°F (-1°C) | 2.2 in | |
| March | 40°F (5°C) | 3.2 in | |
| April | 51°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 4.3 in | Wettest |
| June | 70°F (21°C) | 3.8 in | |
| July | 73°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.7 in | |
| September | 65°F (19°C) | 3.1 in | |
| October | 54°F (12°C) | 2.4 in | |
| November | 43°F (6°C) | 3.2 in | |
| December | 33°F (0°C) | 2.8 in |
Derby has a seasonal temperature swing of 45°F / from 28°F in January to 73°F in July. Total annual precipitation is 38.3 inches, with May being the wettest month (4.3") and January the driest (2.2").