Chester weather by month
What a typical year looks like in Chester, Oklahoma: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Seiling 7wnw Mesonet, 11 km from Chester; records cover 2007–2026.
The year at a glance
- Precipitation a year
- 28.1 in712 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 14
- First fall freeze
- Oct 23
- Heating degree days
- 4,047
- Cooling degree days
- 1,915
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 7°−14° (heating, 99%) and 106°41° (cooling, 1%).
Month by month
Chester in January
Highs average 49°9° and lows 24°−5°, with 0.92 in23 mm of precipitation in a typical January.
- Record high
- 81°27° (2015)
- Record low
- −10°−23° (2025)
- Heating degree days
- 886
- Cooling degree days
- 0
Chester in February
Highs average 53°12° and lows 27°−3°, with 1.1 in28 mm of precipitation in a typical February.
- Record high
- 92°33° (2017)
- Record low
- −20°−29° (2021)
- Heating degree days
- 705
- Cooling degree days
- 1
Chester in March
Highs average 63°17° and lows 36°2°, with 1.9 in47 mm of precipitation in a typical March.
- Record high
- 98°37° (2026)
- Record low
- −2°−19° (2014)
- Heating degree days
- 499
- Cooling degree days
- 9
Chester in April
Highs average 72°22° and lows 45°7°, with 2.8 in70 mm of precipitation in a typical April.
- Record high
- 100°38° (2018)
- Record low
- 17°−8° (2009)
- Heating degree days
- 238
- Cooling degree days
- 37
Chester in May
Highs average 81°27° and lows 55°13°, with 4 in102 mm of precipitation in a typical May.
- Record high
- 104°40° (2011)
- Record low
- 31°−1° (2014)
- Heating degree days
- 72
- Cooling degree days
- 162
Chester in June
Highs average 90°32° and lows 66°19°, with 3.8 in97 mm of precipitation in a typical June.
- Record high
- 110°43° (2012)
- Record low
- 49°9° (2009)
- Heating degree days
- 1
- Cooling degree days
- 379
Chester in July
Highs average 95°35° and lows 70°21°, with 3 in75 mm of precipitation in a typical July.
- Record high
- 113°45° (2022)
- Record low
- 49°9° (2013)
- Heating degree days
- 0
- Cooling degree days
- 529
Chester in August
Highs average 94°35° and lows 68°20°, with 3.1 in77 mm of precipitation in a typical August.
- Record high
- 113°45° (2012)
- Record low
- 46°8° (2010)
- Heating degree days
- 0
- Cooling degree days
- 494
Chester in September
Highs average 86°30° and lows 59°15°, with 2.3 in57 mm of precipitation in a typical September.
- Record high
- 106°41° (2026)
- Record low
- 34°1° (2020)
- Heating degree days
- 25
- Cooling degree days
- 245
Chester in OctoberThis month
Highs average 73°23° and lows 46°8°, with 2.8 in71 mm of precipitation in a typical October.
- Record high
- 98°37° (2024)
- Record low
- 16°−9° (2019)
- Heating degree days
- 224
- Cooling degree days
- 55
Chester in November
Highs average 60°16° and lows 34°1°, with 1.3 in32 mm of precipitation in a typical November.
- Record high
- 91°33° (2023)
- Record low
- 8°−13° (2019)
- Heating degree days
- 540
- Cooling degree days
- 4
Chester in December
Highs average 49°10° and lows 25°−4°, with 1.3 in32 mm of precipitation in a typical December.
- Record high
- 86°30° (2025)
- Record low
- −4°−20° (2013)
- Heating degree days
- 857
- Cooling degree days
- 0