Jefferson City climate — normals and trends
Jefferson City (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 985 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (25.9 °C on average) and the coldest is January (-0.7 °C). Rainfall peaks in May.
Jefferson City averages 87 frost days, 65 hot days (≥ 30 °C) and 111 rainy days per year.
Jefferson City has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 98 to 76 per year over the period.
The hottest day of the period reached 44.6 °C (on 14 July 1954) and the coldest -30.4 °C (on 23 December 1989).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Jefferson CityMissouri
- coords
- 38.58°, -92.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
18.7°C
Average daily low
8.3°C
Annual rainfall
985mm
Sunshine / day
9.1h
Mean relative humidity
69%
Average peak wind
15.4km/h
Seasonal range
26.6°C
Frost days (< 0 °C)
87 d/yr
Hot days (≥ 30 °C)
65 d/yr
Rainy days (≥ 1 mm)
111 d/yr
Annual snowfall
41.2 cm
Average feels-like high
17.7 °C
Average feels-like low
6.4 °C
Average peak gust
35.7 km/h
Tropical nights (≥ 20 °C)
56 d/yr
Solar radiation
15.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.23 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
44.6 °C
14 July 1954
Coldest day
-30.4 °C
23 December 1989
Wettest day
99 mm
17 November 2015
Windiest day
42.7 km/h
27 March 1991
Strongest gust
97.6 km/h
9 April 1973
Hottest feels-like
45.5 °C
14 July 1954
Coldest feels-like
-35.8 °C
23 December 1989
Snowiest day
27.2 cm
1 February 2011
Sunniest day
14.2 h
6 July 2024
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 2.6 °C | -1.6 °C | 55 mm | +3 mm |
| Feb | 5.8 °C | -1.2 °C | 29 mm | -31 mm |
| Mar | 18.4 °C | +5.8 °C | 83 mm | -11 mm |
| Apr | 19.9 °C | +1.0 °C | 153 mm | +40 mm |
| May | 22.7 °C | -1.1 °C | 95 mm | -28 mm |
| Jun | 28.9 °C | -0.1 °C | 183 mm | +83 mm |
| Jul | 31.9 °C | +0.3 °C | 76 mm | -2 mm |
| Aug | 30.7 °C | -0.2 °C | 19 mm | -59 mm |
| Sep | 28.9 °C | +2.3 °C | 94 mm | +15 mm |
| Oct | 22.3 °C | +1.9 °C | 103 mm | +24 mm |
| Nov | 14.2 °C | +1.7 °C | 65 mm | -8 mm |
| Dec | 8.7 °C | +2.3 °C | 17 mm | -42 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Jefferson City?
Jefferson City has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 985 mm of precipitation per year.
What is the hottest day ever recorded in Jefferson City?
The hottest day measured in Jefferson City between 1940 and 2025 was 14 July 1954, reaching 44.6 °C.
What is the coldest day in Jefferson City?
The coldest day measured in Jefferson City between 1940 and 2025 was 23 December 1989, at -30.4 °C.
Does it snow in Jefferson City?
Yes. Jefferson City gets on average 41.2 cm of snow per year and has around 87 frost days.
Has the climate of Jefferson City warmed?
Yes: Jefferson City warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jefferson City?
The wettest day measured in Jefferson City between 1940 and 2025 was 17 November 2015, with 99 mm of rain in 24 hours.
What was the windiest day in Jefferson City?
The windiest day measured in Jefferson City between 1940 and 2025 was 27 March 1991, with winds reaching 42.7 km/h.
What is the warmest month in Jefferson City?
The warmest month in Jefferson City is July (25.9 °C on average); the coldest is January (-0.7 °C).
How much does it rain in Jefferson City?
Jefferson City receives on average 985 mm of precipitation per year, spread over about 111 rainy days.
Is it sunny in Jefferson City?
Jefferson City gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jefferson City?
The heaviest 24-hour snowfall measured in Jefferson City between 1940 and 2025 was 1 February 2011, with 27.2 cm.
Are there tropical nights in Jefferson City?
Yes: Jefferson City has on average 56 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jefferson City?
In Jefferson City, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 14 July 1954, and the lowest was -35.8 °C on 23 December 1989.
Compare Jefferson City with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jefferson City