Sterling weather by month
What a typical year looks like in Sterling, Colorado: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at LEROY 5 WSW, 21 km from Sterling; records cover 1893–2026.
The year at a glance
- Precipitation a year
- 17.3 in439 mm
- Snow a year
- 37 in93 cm
- Last spring freeze
- May 11
- First fall freeze
- Oct 5
- Heating degree days
- 6,565
- Cooling degree days
- 681
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −5°−21° (heating, 99%) and 99°37° (cooling, 1%).
Month by month
Sterling in January
Highs average 40°4° and lows 15°−9°, with 0.32 in8.1 mm of precipitation and 5 in12 cm of snow in a typical January.
- Record high
- 75°24° (1997)
- Record low
- −26°−32° (1930)
- Heating degree days
- 1162
- Cooling degree days
- 0
Sterling in February
Highs average 43°6° and lows 17°−8°, with 0.51 in13 mm of precipitation and 6 in16 cm of snow in a typical February.
- Record high
- 75°24° (1934)
- Record low
- −29°−34° (1936)
- Heating degree days
- 990
- Cooling degree days
- 0
Sterling in March
Highs average 53°12° and lows 25°−4°, with 0.87 in22 mm of precipitation and 6 in14 cm of snow in a typical March.
- Record high
- 89°32° (2026)
- Record low
- −14°−26° (1932)
- Heating degree days
- 814
- Cooling degree days
- 0
Sterling in April
Highs average 60°15° and lows 31°0°, with 1.8 in45 mm of precipitation and 5 in13 cm of snow in a typical April.
- Record high
- 91°33° (1989)
- Record low
- −3°−19° (1975)
- Heating degree days
- 583
- Cooling degree days
- 1
Sterling in May
Highs average 69°21° and lows 42°6°, with 2.8 in71 mm of precipitation and 0.9 in2.3 cm of snow in a typical May.
- Record high
- 98°37° (2003)
- Record low
- 13°−11° (1907)
- Heating degree days
- 310
- Cooling degree days
- 18
Sterling in June
Highs average 81°27° and lows 52°11°, with 2.3 in58 mm of precipitation in a typical June.
- Record high
- 107°42° (1990)
- Record low
- 31°−1° (1917)
- Heating degree days
- 65
- Cooling degree days
- 120
Sterling in July
Highs average 88°31° and lows 59°15°, with 3 in76 mm of precipitation in a typical July.
- Record high
- 108°42° (1990)
- Record low
- 39°4° (1915)
- Heating degree days
- 9
- Cooling degree days
- 268
Sterling in August
Highs average 86°30° and lows 56°13°, with 2.3 in59 mm of precipitation in a typical August.
- Record high
- 105°41° (1938)
- Record low
- 40°4° (1906)
- Heating degree days
- 21
- Cooling degree days
- 203
Sterling in September
Highs average 78°26° and lows 47°8°, with 1.3 in32 mm of precipitation and 0.4 in1 cm of snow in a typical September.
- Record high
- 102°39° (1985)
- Record low
- 14°−10° (1985)
- Heating degree days
- 140
- Cooling degree days
- 68
Sterling in OctoberThis month
Highs average 64°18° and lows 35°1°, with 1.2 in29 mm of precipitation and 2.3 in5.8 cm of snow in a typical October.
- Record high
- 92°33° (1922)
- Record low
- −3°−19° (2020)
- Heating degree days
- 498
- Cooling degree days
- 3
Sterling in November
Highs average 50°10° and lows 24°−4°, with 0.55 in14 mm of precipitation and 5 in13 cm of snow in a typical November.
- Record high
- 81°27° (1916)
- Record low
- −13°−25° (1900)
- Heating degree days
- 834
- Cooling degree days
- 0
Sterling in December
Highs average 40°5° and lows 16°−9°, with 0.44 in11 mm of precipitation and 6 in16 cm of snow in a typical December.
- Record high
- 73°23° (2021)
- Record low
- −28°−33° (1919)
- Heating degree days
- 1139
- Cooling degree days
- 0
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