Cape Girardeau climate — normals and trends
Cape Girardeau (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 1,124 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 (26.3 °C on average) and the coldest is January (1.1 °C). Rainfall peaks in March.
Cape Girardeau averages 72 frost days, 66 hot days (≥ 30 °C) and 112 rainy days per year.
Cape Girardeau has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 81 to 63 per year over the period.
The hottest day of the period reached 41.4 °C (on 29 June 2012) and the coldest -30.6 °C (on 2 February 1951).
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
Cape GirardeauMissouri
- coords
- 37.31°, -89.52°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
19.4°C
Average daily low
9.7°C
Annual rainfall
1,124mm
Sunshine / day
9.2h
Mean relative humidity
69%
Average peak wind
15.6km/h
Seasonal range
25.2°C
Frost days (< 0 °C)
72 d/yr
Hot days (≥ 30 °C)
66 d/yr
Rainy days (≥ 1 mm)
112 d/yr
Annual snowfall
25.1 cm
Average feels-like high
18.8 °C
Average feels-like low
8.0 °C
Average peak gust
35.7 km/h
Tropical nights (≥ 20 °C)
71 d/yr
Solar radiation
15.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °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
41.4 °C
29 June 2012
Coldest day
-30.6 °C
2 February 1951
Wettest day
109 mm
13 September 1945
Windiest day
50.9 km/h
11 February 2009
Strongest gust
111.6 km/h
18 January 1996
Hottest feels-like
45.1 °C
3 August 2010
Coldest feels-like
-36.2 °C
2 February 1951
Snowiest day
21.0 cm
16 January 1978
Sunniest day
14.0 h
20 May 1940
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 | 4.1 °C | -1.5 °C | 116 mm | +28 mm |
| Feb | 8.2 °C | 0.0 °C | 145 mm | +58 mm |
| Mar | 18.4 °C | +4.6 °C | 80 mm | -43 mm |
| Apr | 21.5 °C | +1.7 °C | 204 mm | +84 mm |
| May | 23.3 °C | -1.4 °C | 189 mm | +72 mm |
| Jun | 29.9 °C | +0.4 °C | 169 mm | +85 mm |
| Jul | 31.7 °C | +0.4 °C | 94 mm | +11 mm |
| Aug | 30.3 °C | -0.3 °C | 10 mm | -63 mm |
| Sep | 29.5 °C | +2.4 °C | 72 mm | -3 mm |
| Oct | 22.5 °C | +1.4 °C | 119 mm | +35 mm |
| Nov | 15.5 °C | +2.1 °C | 63 mm | -36 mm |
| Dec | 8.5 °C | +0.8 °C | 32 mm | -59 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 Cape Girardeau?
Cape Girardeau has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 1,124 mm of precipitation per year.
What is the hottest day ever recorded in Cape Girardeau?
The hottest day measured in Cape Girardeau between 1940 and 2025 was 29 June 2012, reaching 41.4 °C.
What is the coldest day in Cape Girardeau?
The coldest day measured in Cape Girardeau between 1940 and 2025 was 2 February 1951, at -30.6 °C.
Does it snow in Cape Girardeau?
Yes. Cape Girardeau gets on average 25.1 cm of snow per year and has around 72 frost days.
Has the climate of Cape Girardeau warmed?
Yes: Cape Girardeau warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cape Girardeau?
The wettest day measured in Cape Girardeau between 1940 and 2025 was 13 September 1945, with 109 mm of rain in 24 hours.
What was the windiest day in Cape Girardeau?
The windiest day measured in Cape Girardeau between 1940 and 2025 was 11 February 2009, with winds reaching 50.9 km/h.
What is the warmest month in Cape Girardeau?
The warmest month in Cape Girardeau is July (26.3 °C on average); the coldest is January (1.1 °C).
How much does it rain in Cape Girardeau?
Cape Girardeau receives on average 1,124 mm of precipitation per year, spread over about 112 rainy days.
Is it sunny in Cape Girardeau?
Cape Girardeau gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Cape Girardeau?
The heaviest 24-hour snowfall measured in Cape Girardeau between 1940 and 2025 was 16 January 1978, with 21.0 cm.
Are there tropical nights in Cape Girardeau?
Yes: Cape Girardeau has on average 71 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Cape Girardeau?
In Cape Girardeau, between 1940 and 2025, the highest apparent temperature reached 45.1 °C on 3 August 2010, and the lowest was -36.2 °C on 2 February 1951.
Compare Cape Girardeau with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cape Girardeau