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Weather & Climate in Formoso, KS
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Formoso experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 28°F in January while summers reach 80°F in July. The area gets 326 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 29.9 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 39. The city sits at an elevation of 1,527 feet.
Temperature
28°F Jan (-2°C)
80°F Jul (27°C)
| Annual Average | 54.8°F |
| 1% above US avg | |
| January Average | 28°F (-2°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 326 days/yr |
Geography
| Elevation | 1,527 ft (465 m) |
| Area | 0.3 sq mi (0.7 km²) |
| Population Density | 324/sq mi |
| Coordinates | 39.7785°N, 97.9929°W |
| Timezone | America/Chicago |
| County | Republic County County |
| Nearest Airport | Salina Regional (SLN) 71 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.9 / 100 |
| Social Vulnerability | 35.2 / 100 |
| Community Resilience | 81.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
171 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Jun 22, 2019 | 2 km SSE of Zurich, Kansas | M4.6 | 138 km | 3 km |
| Jul 17, 2022 | 8 km WSW of Superior, Nebraska | M3.8 | 28 km | 3 km |
| Jun 12, 2017 | 8 km NNE of Jewell, Kansas | M3.7 | 11 km | 5 km |
| Jun 12, 2017 | 5 km SE of Mankato, Kansas | M3.7 | 16 km | 5 km |
| May 6, 2021 | 5 km S of Formoso, Kansas | M3.6 | 5 km | 5 km |
| Jun 13, 2017 | 6 km SE of Mankato, Kansas | M3.6 | 15 km | 5 km |
| May 15, 2025 | 5 km NNW of Herington, Kansas | M3.5 | 147 km | 5 km |
| Aug 9, 2021 | Kansas | M3.5 | 34 km | 5 km |
| Oct 10, 2024 | 6 km WSW of Woodbine, Kansas | M3.5 | 139 km | 10 km |
| May 30, 1991 | 5 km SE of Zurich, Kansas | M3.5 | 137 km | 5 km |
| May 31, 2019 | 2 km SSE of Zurich, Kansas | M3.5 | 138 km | 5 km |
| Mar 12, 2020 | 6 km NNE of Hope, Kansas | M3.5 | 142 km | 5 km |
| Aug 2, 2025 | 6 km ENE of Assaria, Kansas | M3.4 | 125 km | 5 km |
| Jun 25, 2025 | 10 km NW of Woodston, Kansas | M3.4 | 107 km | 13 km |
| Apr 4, 2017 | 3 km SSE of Mankato, Kansas | M3.4 | 17 km | 15 km |
| May 21, 2017 | 7 km ESE of Mankato, Kansas | M3.4 | 13 km | 16 km |
| Sep 18, 2023 | Nebraska | M3.4 | 53 km | 10 km |
| Jul 26, 2022 | 8 km WSW of Superior, Nebraska | M3.4 | 27 km | 5 km |
| Jul 29, 2021 | 11 km SSE of Esbon, Kansas | M3.3 | 33 km | 5 km |
| Apr 7, 2017 | 7 km ESE of Mankato, Kansas | M3.3 | 12 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
676 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 15 fatalities, 279 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 5, 1964 | EF5 | 92 km | 79.7 mi | 4 |
| May 25, 2016 | EF4 | 99 km | 25.1 mi | 0 |
| May 22, 2004 | EF4 | 83 km | 54.0 mi | 1 |
| Jun 15, 1992 | EF4 | 44 km | 3.0 mi | 0 |
| Mar 13, 1990 | EF4 | 55 km | 131.0 mi | 0 |
| May 10, 1985 | EF4 | 99 km | 56.0 mi | 0 |
| May 20, 1957 | EF4 | 50 km | 44.6 mi | 0 |
| Apr 25, 1957 | EF4 | 96 km | 89.8 mi | 1 |
| Jun 4, 1955 | EF4 | 54 km | 61.9 mi | 0 |
| May 1, 2018 | EF3 | 94 km | 15.8 mi | 0 |
| May 6, 2015 | EF3 | 39 km | 1.9 mi | 0 |
| May 11, 2014 | EF3 | 80 km | 20.2 mi | 0 |
| May 28, 2013 | EF3 | 86 km | 2.3 mi | 0 |
| May 27, 2013 | EF3 | 48 km | 5.7 mi | 0 |
| May 29, 2008 | EF3 | 7 km | 55.2 mi | 0 |
| May 29, 2008 | EF3 | 44 km | 18.9 mi | 0 |
| Sep 22, 2001 | EF3 | 73 km | 10.0 mi | 0 |
| Jul 24, 1993 | EF3 | 98 km | 9.0 mi | 0 |
| May 7, 1993 | EF3 | 67 km | 75.0 mi | 0 |
| Jun 15, 1992 | EF3 | 44 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
6 wildfires (100+ acres) recorded within 100 km. Largest: NORTH BRANCH (10,926 acres, 2022).
| Year | Name | Acres Burned | Distance |
| 2022 | NORTH BRANCH | 10,926 | 33 km |
| 2009 | ROSEBROOK | 2,968 | 81 km |
| 2009 | CRAIG NALER | 1,464 | 88 km |
| 2023 | ROCK CREEK | 1,433 | 87 km |
| 2000 | UNNAMED | 1,394 | 80 km |
| 1991 | UNNAMED | 1,296 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 0.5 in | Coldest, Driest |
| February | 32°F (-0°C) | 0.8 in | |
| March | 42°F (5°C) | 2.2 in | |
| April | 53°F (11°C) | 2.4 in | |
| May | 63°F (17°C) | 4.1 in | Wettest |
| June | 73°F (23°C) | 4.1 in | |
| July | 80°F (27°C) | 3.5 in | Warmest |
| August | 77°F (25°C) | 3.4 in | |
| September | 67°F (20°C) | 3.3 in | |
| October | 55°F (13°C) | 2.0 in | |
| November | 40°F (4°C) | 1.1 in | |
| December | 30°F (-1°C) | 0.8 in |
Formoso has a seasonal temperature swing of 52°F / from 28°F in January to 80°F in July. Total annual precipitation is 28.0 inches, with May being the wettest month (4.1") and January the driest (0.5").