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DeKalb County Climate

DeKalb County, Missouri

JanFebMarAprMayJunJulAugSepOctNovDec52.0°AVG °F

Avg Annual Temp

52.0°F

Annual Precip

39.5"

Annual Snowfall

20.7"

Extreme Heat Days

32.45

days >= 90°F/yr

Monthly Temperature

54.4°F avgJFMAMJJASOND

Precipitation Calendar

Dry
Wet❄= snowfall
❄1.1"
❄1.4"
❄2.5"
❄3.8"
5.5"
5.0"
4.6"
4.3"
4.1"
❄3.1"
❄2.3"
❄1.7"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Seasonal Overview

Comfort ZoneSpring41°63°11.8"Summer72°77°14.0"Fall41°66°9.6"Winter25°30°4.2"20°40°60°80°100°

National Comparison

Warmer than 40% of US counties
Wetter than 44% of US counties
More seasonal variation than 80% of US counties

Climate Profile

About DeKalb County Weather

A cool northern Missouri climate

DeKalb County’s 52.0°F annual average is below the national median, indicating a cooler-leaning profile. The area experiences brisk winters and shorter periods of intense summer heat.

Below the Missouri temperature norm

The county’s 52.0°F average sits nearly 3 degrees below the Missouri state average of 54.9°F. It also records 20.7 inches of snow, nearly double what some southern counties receive.

Heavy snow compared to neighbors

DeKalb receives 20.7 inches of snow annually, outpacing Daviess County’s 19.1 inches. It also experiences slightly more extreme heat days than its immediate eastern neighbor.

Snowy winters and 32 heat days

Winter is the dominant season, featuring a 28.1°F average temperature and over 20 inches of snow. July remains warm at 76.6°F, contributing to 32 days above 90°F.

Prioritize snow and ice management

A high-quality snow blower is essential for managing the 20.7 inches of annual accumulation. Ensure your furnace is serviced annually to handle the deep 24.9°F January freezes.

Frequently Asked Questions

What is the average temperature in DeKalb County?
The average annual temperature in DeKalb County, MO is 52.0°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does DeKalb County get?
DeKalb County receives an average of 39.5 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in DeKalb County?
Yes, DeKalb County receives an average of 20.7 inches of snowfall per year according to NOAA climate normals.
How hot does DeKalb County get in summer?
The average summer temperature (June-August) in DeKalb County is 74.5°F. The county experiences an average of 32.45 days per year above 90°F.
How cold are winters in DeKalb County?
The average winter temperature (December-February) in DeKalb County is 28.1°F. January, typically the coldest month, averages 24.9°F.

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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.

Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.

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