Sweetwater weather by month
What a typical year looks like in Sweetwater, Oklahoma: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Cheyenne 6sw Mesonet, 23 km from Sweetwater; records cover 2007–2026.
The year at a glance
- Precipitation a year
- 26.8 in681 mm
- Snow a year
- Rare
- Last spring freeze
- Mar 30
- First fall freeze
- Oct 27
- Heating degree days
- 3,706
- Cooling degree days
- 1,839
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 10°−12° (heating, 99%) and 103°40° (cooling, 1%).
Month by month
Sweetwater in January
Highs average 50°10° and lows 28°−2°, with 0.89 in23 mm of precipitation in a typical January.
- Record high
- 82°28° (2016)
- Record low
- −2°−19° (2025)
- Heating degree days
- 821
- Cooling degree days
- 0
Sweetwater in February
Highs average 54°12° and lows 30°−1°, with 0.85 in22 mm of precipitation in a typical February.
- Record high
- 94°34° (2017)
- Record low
- −9°−23° (2021)
- Heating degree days
- 650
- Cooling degree days
- 2
Sweetwater in March
Highs average 63°17° and lows 38°3°, with 1.7 in43 mm of precipitation in a typical March.
- Record high
- 99°37° (2026)
- Record low
- 1°−17° (2014)
- Heating degree days
- 454
- Cooling degree days
- 10
Sweetwater in April
Highs average 71°21° and lows 47°8°, with 2.9 in74 mm of precipitation in a typical April.
- Record high
- 99°37° (2018)
- Record low
- 19°−7° (2018)
- Heating degree days
- 225
- Cooling degree days
- 38
Sweetwater in May
Highs average 79°26° and lows 57°14°, with 4 in101 mm of precipitation in a typical May.
- Record high
- 102°39° (2026)
- Record low
- 33°1° (2013)
- Heating degree days
- 65
- Cooling degree days
- 160
Sweetwater in June
Highs average 88°31° and lows 66°19°, with 3.5 in88 mm of precipitation in a typical June.
- Record high
- 112°44° (2011)
- Record low
- 52°11° (2009)
- Heating degree days
- 1
- Cooling degree days
- 350
Sweetwater in July
Highs average 94°35° and lows 70°21°, with 2.6 in67 mm of precipitation in a typical July.
- Record high
- 111°44° (2022)
- Record low
- 57°14° (2013)
- Heating degree days
- 0
- Cooling degree days
- 524
Sweetwater in August
Highs average 91°33° and lows 68°20°, with 3.1 in78 mm of precipitation in a typical August.
- Record high
- 109°43° (2012)
- Record low
- 52°11° (2010)
- Heating degree days
- 0
- Cooling degree days
- 451
Sweetwater in September
Highs average 84°29° and lows 61°16°, with 2.4 in61 mm of precipitation in a typical September.
- Record high
- 104°40° (2023)
- Record low
- 41°5° (2020)
- Heating degree days
- 22
- Cooling degree days
- 237
Sweetwater in OctoberThis month
Highs average 73°23° and lows 49°9°, with 2.6 in67 mm of precipitation in a typical October.
- Record high
- 98°37° (2020)
- Record low
- 19°−7° (2019)
- Heating degree days
- 196
- Cooling degree days
- 62
Sweetwater in November
Highs average 60°16° and lows 38°3°, with 1.3 in32 mm of precipitation in a typical November.
- Record high
- 92°33° (2023)
- Record low
- 8°−13° (2019)
- Heating degree days
- 488
- Cooling degree days
- 5
Sweetwater in December
Highs average 50°10° and lows 29°−1°, with 1.1 in27 mm of precipitation in a typical December.
- Record high
- 86°30° (2025)
- Record low
- −2°−19° (2016)
- Heating degree days
- 784
- Cooling degree days
- 0