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Saint Joseph, Missouri climate

Cfa Humid subtropical

Saint Joseph has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 31°C, while the coldest is January averaging around −7°C at night. Precipitation totals about 998 mm a year and is strongly seasonal — May alone averages 135 mm while January barely receives 29 mm. Light snow accumulates each winter (46 cm of snow per year on average).

☀️ Summers
Hot
Highs near 31°C in July.
❄️ Winters
Very cold
Lows near −7°C in January.
🌧️ Rain & snow
Moderate rainfall
About 998 mm of rain a year, plus 46 cm of snow.
Snow falls through the winter months
⛅ Sky & trend
Partly cloudy
A roughly even mix of sun and cloud.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figures TEMPERATURE °C -10°0°10°20°30°40° PRECIPITATION (mm) 070140 RainSnow JanAprJulOct

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER) 0h2h4h6h8h J: ~3.6 hours of sun/dayF: ~3.8 hours of sun/dayM: ~4.2 hours of sun/dayA: ~4.9 hours of sun/dayM: ~5.4 hours of sun/dayJ: ~6.8 hours of sun/dayJ: ~7.6 hours of sun/dayA: ~7.0 hours of sun/dayS: ~6.7 hours of sun/dayO: ~5.3 hours of sun/dayN: ~4.1 hours of sun/dayD: ~3.7 hours of sun/day JFMAMJJASOND Sun hours per day (est.)

Saint Joseph climate normals (1991–2020)

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)461319242931312620126
Avg temp (°C)−2171318232625201461
Avg low (°C)−7−517121820191481−5
Precipitation (mm)293860103135133116108103835140
Snowfall (cm)121541—————1310
Jan – JunJanFebMarAprMayJun
Avg high (°C)4613192429
Avg temp (°C)−217131823
Avg low (°C)−7−5171218
Precipitation (mm)293860103135133
Snowfall (cm)121541——
Jul – DecJulAugSepOctNovDec
Avg high (°C)31312620126
Avg temp (°C)2625201461
Avg low (°C)20191481−5
Precipitation (mm)116108103835140
Snowfall (cm)———1310

Sky & atmosphere

JanFebMarAprMayJunJulAugSepOctNovDec
Cloud cover (%)626464636254484845525860
Relative humidity (%)817874727475706869717682
Wind speed (km/h)12.713.113.613.711.410.38.98.510.011.311.911.7
Jan – JunJanFebMarAprMayJun
Cloud cover (%)626464636254
Relative humidity (%)817874727475
Wind speed (km/h)12.713.113.613.711.410.3
Jul – DecJulAugSepOctNovDec
Cloud cover (%)484845525860
Relative humidity (%)706869717682
Wind speed (km/h)8.98.510.011.311.911.7

30-year delta table (1991–2020 minus 1981–2010, °F)

JanFebMarAprMayJunJulAugSepOctNovDec
Δ Max temp+0.4+0.3+0.3-0.2+0.2+0.7+0.0-0.3+0.2+0.3+0.3+2.0
Δ Avg temp+0.2+0.1+0.3-0.2+0.1+0.6-0.1-0.4+0.2+0.0+0.0+1.6
Δ Min temp-0.1-0.2+0.2-0.3+0.1+0.4-0.3-0.5+0.2-0.3-0.5+1.3
Jan – JunJanFebMarAprMayJun
Δ Max temp+0.4+0.3+0.3-0.2+0.2+0.7
Δ Avg temp+0.2+0.1+0.3-0.2+0.1+0.6
Δ Min temp-0.1-0.2+0.2-0.3+0.1+0.4
Jul – DecJulAugSepOctNovDec
Δ Max temp+0.0-0.3+0.2+0.3+0.3+2.0
Δ Avg temp-0.1-0.4+0.2+0.0+0.0+1.6
Δ Min temp-0.3-0.5+0.2-0.3-0.5+1.3
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Kansas City Intl AP (NOAA GHCN station USW00003947), about 53 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →