Foster County Climate
Foster County, North Dakota
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
40.3°F
Annual Precip
21.0"
Annual Snowfall
59.8"
Extreme Heat Days
8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4a
Minimum winter temperature range for plant survival
2,097
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Foster County
Climate Verdict
Foster County has a cool, averaging 40.3°F annually, semi-arid conditions with only 21.0 inches of annual precipitation, rare extreme heat with only 7.866666666666667 days above 90°F annually, moderate snowfall of 59.8 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are severe, with January averaging a frigid 8.2°F. summers are pleasantly cool with July averaging 69.0°F. Residents experience a substantial 61°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Foster County closely matches the North Dakota statewide average temperature of 40.9°F.
Climate Profile
About Foster County Weather
A Snow-Heavy Continental Climate
Foster County averages 40.3°F, which is far below the 55°F national median. It is characterized by a harsh continental climate and significant annual snowfall.
Colder and Much Snowier
At 40.3°F, Foster is slightly cooler than the state average. It stands out for its 59.8 inches of annual snowfall, which is nearly 20 inches higher than many other counties.
Leader in Regional Snowfall
Foster is much snowier than nearby Cass or Dickey, receiving nearly 17 more inches of snow than Cass annually. Its 8.2°F January average makes it one of the colder spots in central North Dakota.
Mild Summers and Long Winters
Summer is brief and mild with only 8 days of extreme heat. Winter dominates the year, featuring a 11.5°F seasonal average and nearly 60 inches of total snow.
Heavy Snow Equipment Needed
Invest in professional-grade snow removal tools to handle the 59.8 inches of annual snowfall. Winterize homes early to withstand the long periods of 11.5°F winter weather.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.