North Rock Springs weather by month
What a typical year looks like in North Rock Springs, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Rock Springs Airport, 21 km from North Rock Springs; records cover 1948–2026.
The year at a glance
- Precipitation a year
- 7.6 in192 mm
- Snow a year
- 54 in137 cm
- Last spring freeze
- May 29
- First fall freeze
- Sep 21
- Heating degree days
- 8,064
- Cooling degree days
- 320
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −7°−22° (heating, 99%) and 92°33° (cooling, 1%).
Month by month
North Rock Springs in January
Highs average 30°−1° and lows 14°−10°, with 0.38 in9.7 mm of precipitation and 8 in21 cm of snow in a typical January.
- Record high
- 55°13° (1969)
- Record low
- −37°−38° (1963)
- Heating degree days
- 1347
- Cooling degree days
- 0
North Rock Springs in February
Highs average 33°0° and lows 16°−9°, with 0.37 in9.4 mm of precipitation and 8 in20 cm of snow in a typical February.
- Record high
- 60°16° (1977)
- Record low
- −29°−34° (1989)
- Heating degree days
- 1139
- Cooling degree days
- 0
North Rock Springs in March
Highs average 44°7° and lows 24°−4°, with 0.58 in15 mm of precipitation and 6 in16 cm of snow in a typical March.
- Record high
- 78°26° (2026)
- Record low
- −12°−24° (1969)
- Heating degree days
- 961
- Cooling degree days
- 0
North Rock Springs in April
Highs average 53°12° and lows 30°−1°, with 0.91 in23 mm of precipitation and 9 in22 cm of snow in a typical April.
- Record high
- 79°26° (1989)
- Record low
- 2°−17° (1975)
- Heating degree days
- 712
- Cooling degree days
- 0
North Rock Springs in May
Highs average 63°17° and lows 38°4°, with 1.3 in32 mm of precipitation and 2.7 in6.9 cm of snow in a typical May.
- Record high
- 90°32° (2002)
- Record low
- 14°−10° (1967)
- Heating degree days
- 442
- Cooling degree days
- 2
North Rock Springs in June
Highs average 75°24° and lows 47°8°, with 0.7 in18 mm of precipitation and 0.4 in1 cm of snow in a typical June.
- Record high
- 96°36° (1954)
- Record low
- 26°−3° (1951)
- Heating degree days
- 159
- Cooling degree days
- 39
North Rock Springs in July
Highs average 84°29° and lows 55°13°, with 0.47 in12 mm of precipitation in a typical July.
- Record high
- 98°37° (2002)
- Record low
- 35°2° (1968)
- Heating degree days
- 21
- Cooling degree days
- 159
North Rock Springs in August
Highs average 82°28° and lows 53°12°, with 0.56 in14 mm of precipitation in a typical August.
- Record high
- 97°36° (2026)
- Record low
- 33°1° (1962)
- Heating degree days
- 38
- Cooling degree days
- 109
North Rock Springs in September
Highs average 71°22° and lows 44°7°, with 0.79 in20 mm of precipitation and 1.2 in3 cm of snow in a typical September.
- Record high
- 93°34° (2022)
- Record low
- 5°−15° (1965)
- Heating degree days
- 242
- Cooling degree days
- 11
North Rock Springs in OctoberThis month
Highs average 56°13° and lows 33°0°, with 0.81 in21 mm of precipitation and 7 in17 cm of snow in a typical October.
- Record high
- 83°28° (2007)
- Record low
- −10°−23° (2020)
- Heating degree days
- 637
- Cooling degree days
- 0
North Rock Springs in November
Highs average 41°5° and lows 22°−6°, with 0.4 in10 mm of precipitation and 6 in15 cm of snow in a typical November.
- Record high
- 66°19° (1977)
- Record low
- −13°−25° (1976)
- Heating degree days
- 1016
- Cooling degree days
- 0
North Rock Springs in December
Highs average 30°−1° and lows 13°−10°, with 0.31 in7.9 mm of precipitation and 6 in15 cm of snow in a typical December.
- Record high
- 59°15° (2025)
- Record low
- −29°−34° (1978)
- Heating degree days
- 1350
- Cooling degree days
- 0