Saint Joseph climate — normals and trends
Saint Joseph (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.9 °C and it receives 959 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 (25.6 °C on average) and the coldest is January (-3.3 °C). Rainfall peaks in May.
Saint Joseph averages 105 frost days, 53 hot days (≥ 30 °C) and 103 rainy days per year.
Saint Joseph has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 115 to 95 per year over the period.
The hottest day of the period reached 42.5 °C (on 13 July 1954) and the coldest -32.0 °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
Saint JosephMissouri
- coords
- 39.77°, -94.85°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.9°C
Average daily high
17.1°C
Average daily low
7.0°C
Annual rainfall
959mm
Sunshine / day
9.2h
Mean relative humidity
68%
Average peak wind
20.2km/h
Seasonal range
28.9°C
Frost days (< 0 °C)
105 d/yr
Hot days (≥ 30 °C)
53 d/yr
Rainy days (≥ 1 mm)
103 d/yr
Annual snowfall
51.9 cm
Average feels-like high
15.5 °C
Average feels-like low
4.4 °C
Average peak gust
39.3 km/h
Tropical nights (≥ 20 °C)
51 d/yr
Solar radiation
15.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.27 · 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
42.5 °C
13 July 1954
Coldest day
-32.0 °C
23 December 1989
Wettest day
190 mm
6 July 1986
Windiest day
59.1 km/h
5 May 1950
Strongest gust
116.3 km/h
15 December 2021
Hottest feels-like
45.7 °C
13 July 1954
Coldest feels-like
-37.6 °C
23 December 1989
Snowiest day
28.1 cm
1 January 1948
Sunniest day
14.8 h
19 June 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 | -0.3 °C | -1.8 °C | 56 mm | +21 mm |
| Feb | 2.6 °C | -1.9 °C | 14 mm | -26 mm |
| Mar | 16.6 °C | +5.9 °C | 62 mm | -15 mm |
| Apr | 18.6 °C | +1.1 °C | 117 mm | +10 mm |
| May | 23.5 °C | +0.6 °C | 94 mm | -38 mm |
| Jun | 29.0 °C | +0.8 °C | 117 mm | -3 mm |
| Jul | 31.1 °C | +0.5 °C | 197 mm | +100 mm |
| Aug | 28.7 °C | -1.1 °C | 45 mm | -41 mm |
| Sep | 27.6 °C | +2.0 °C | 44 mm | -46 mm |
| Oct | 22.1 °C | +2.9 °C | 72 mm | -8 mm |
| Nov | 12.9 °C | +2.0 °C | 56 mm | +3 mm |
| Dec | 7.1 °C | +2.9 °C | 32 mm | -9 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 Saint Joseph?
Saint Joseph has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.9 °C and it receives 959 mm of precipitation per year.
What is the hottest day ever recorded in Saint Joseph?
The hottest day measured in Saint Joseph between 1940 and 2025 was 13 July 1954, reaching 42.5 °C.
What is the coldest day in Saint Joseph?
The coldest day measured in Saint Joseph between 1940 and 2025 was 23 December 1989, at -32.0 °C.
Does it snow in Saint Joseph?
Yes. Saint Joseph gets on average 51.9 cm of snow per year and has around 105 frost days.
Has the climate of Saint Joseph warmed?
Yes: Saint Joseph warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Saint Joseph?
The wettest day measured in Saint Joseph between 1940 and 2025 was 6 July 1986, with 190 mm of rain in 24 hours.
What was the windiest day in Saint Joseph?
The windiest day measured in Saint Joseph between 1940 and 2025 was 5 May 1950, with winds reaching 59.1 km/h.
What is the warmest month in Saint Joseph?
The warmest month in Saint Joseph is July (25.6 °C on average); the coldest is January (-3.3 °C).
How much does it rain in Saint Joseph?
Saint Joseph receives on average 959 mm of precipitation per year, spread over about 103 rainy days.
Is it sunny in Saint Joseph?
Saint Joseph 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 Saint Joseph?
The heaviest 24-hour snowfall measured in Saint Joseph between 1940 and 2025 was 1 January 1948, with 28.1 cm.
Are there tropical nights in Saint Joseph?
Yes: Saint Joseph has on average 51 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Saint Joseph?
In Saint Joseph, between 1940 and 2025, the highest apparent temperature reached 45.7 °C on 13 July 1954, and the lowest was -37.6 °C on 23 December 1989.
Compare Saint Joseph with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Saint Joseph