Foster weather by month
What a typical year looks like in Foster, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Butler 4w, 14 km from Foster; records cover 1946–2026.
The year at a glance
- Precipitation a year
- 43.6 in1107 mm
- Snow a year
- 10 in24 cm
- Last spring freeze
- Apr 12
- First fall freeze
- Oct 20
- Heating degree days
- 4,874
- Cooling degree days
- 1,469
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 3°−16° (heating, 99%) and 100°38° (cooling, 1%).
Month by month
Foster in January
Highs average 40°5° and lows 20°−7°, with 1.6 in41 mm of precipitation and 2.6 in6.6 cm of snow in a typical January.
- Record high
- 75°24° (1950)
- Record low
- −19°−28° (1977)
- Heating degree days
- 1086
- Cooling degree days
- 0
Foster in February
Highs average 46°8° and lows 24°−5°, with 2 in50 mm of precipitation and 3 in8 cm of snow in a typical February.
- Record high
- 81°27° (2024)
- Record low
- −24°−31° (1979)
- Heating degree days
- 851
- Cooling degree days
- 0
Foster in March
Highs average 56°14° and lows 33°1°, with 2.8 in70 mm of precipitation and 1.2 in3 cm of snow in a typical March.
- Record high
- 94°34° (2026)
- Record low
- −8°−22° (2002)
- Heating degree days
- 630
- Cooling degree days
- 3
Foster in April
Highs average 66°19° and lows 43°6°, with 4.6 in116 mm of precipitation in a typical April.
- Record high
- 93°34° (2006)
- Record low
- 12°−11° (1975)
- Heating degree days
- 328
- Cooling degree days
- 19
Foster in May
Highs average 76°24° and lows 55°13°, with 6.3 in159 mm of precipitation in a typical May.
- Record high
- 95°35° (1998)
- Record low
- 27°−3° (1963)
- Heating degree days
- 100
- Cooling degree days
- 110
Foster in June
Highs average 85°29° and lows 65°18°, with 5.6 in143 mm of precipitation in a typical June.
- Record high
- 104°40° (1952)
- Record low
- 40°4° (1946)
- Heating degree days
- 6
- Cooling degree days
- 300
Foster in July
Highs average 90°32° and lows 69°21°, with 4.4 in111 mm of precipitation in a typical July.
- Record high
- 117°47° (1954)
- Record low
- 45°7° (1972)
- Heating degree days
- 0
- Cooling degree days
- 443
Foster in August
Highs average 88°31° and lows 66°19°, with 3.8 in95 mm of precipitation in a typical August.
- Record high
- 110°43° (1946)
- Record low
- 44°7° (1950)
- Heating degree days
- 1
- Cooling degree days
- 386
Foster in September
Highs average 81°27° and lows 57°14°, with 4.3 in109 mm of precipitation in a typical September.
- Record high
- 109°43° (2000)
- Record low
- 29°−2° (1983)
- Heating degree days
- 48
- Cooling degree days
- 171
Foster in OctoberThis month
Highs average 70°21° and lows 45°7°, with 3.5 in88 mm of precipitation in a typical October.
- Record high
- 97°36° (1963)
- Record low
- 18°−8° (1993)
- Heating degree days
- 268
- Cooling degree days
- 35
Foster in November
Highs average 56°13° and lows 34°1°, with 2.9 in73 mm of precipitation and 0.3 in0.8 cm of snow in a typical November.
- Record high
- 83°28° (1999)
- Record low
- 1°−17° (1964)
- Heating degree days
- 612
- Cooling degree days
- 2
Foster in December
Highs average 45°7° and lows 25°−4°, with 2.1 in53 mm of precipitation and 2.4 in6.1 cm of snow in a typical December.
- Record high
- 76°24° (2025)
- Record low
- −26°−32° (1989)
- Heating degree days
- 944
- Cooling degree days
- 0