Atlantic City weather by month
What a typical year looks like in Atlantic City, Wyoming: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Lander 11 Sse, 20 km from Atlantic City; records cover 2004–2026.
The year at a glance
- Precipitation a year
- 16 in407 mm
- Snow a year
- Rare
- Last spring freeze
- May 14
- First fall freeze
- Oct 2
- Heating degree days
- 7,496
- Cooling degree days
- 499
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 95°35° (cooling, 1%).
Month by month
Atlantic City in January
Highs average 35°2° and lows 13°−10°, with 0.89 in23 mm of precipitation in a typical January.
- Record high
- 60°16° (2026)
- Record low
- −23°−31° (2023)
- Heating degree days
- 1273
- Cooling degree days
- 0
Atlantic City in February
Highs average 37°3° and lows 16°−9°, with 0.97 in25 mm of precipitation in a typical February.
- Record high
- 63°17° (2026)
- Record low
- −25°−32° (2006)
- Heating degree days
- 1080
- Cooling degree days
- 0
Atlantic City in March
Highs average 48°9° and lows 25°−4°, with 1.5 in37 mm of precipitation in a typical March.
- Record high
- 81°27° (2026)
- Record low
- −11°−24° (2022)
- Heating degree days
- 892
- Cooling degree days
- 0
Atlantic City in April
Highs average 55°13° and lows 31°−1°, with 2.4 in62 mm of precipitation in a typical April.
- Record high
- 82°28° (2007)
- Record low
- 1°−17° (2020)
- Heating degree days
- 664
- Cooling degree days
- 0
Atlantic City in May
Highs average 65°18° and lows 40°4°, with 2.8 in71 mm of precipitation in a typical May.
- Record high
- 87°31° (2014)
- Record low
- 16°−9° (2010)
- Heating degree days
- 401
- Cooling degree days
- 7
Atlantic City in June
Highs average 77°25° and lows 48°9°, with 1.4 in35 mm of precipitation in a typical June.
- Record high
- 98°37° (2012)
- Record low
- 29°−2° (2019)
- Heating degree days
- 132
- Cooling degree days
- 57
Atlantic City in July
Highs average 86°30° and lows 56°14°, with 0.79 in20 mm of precipitation in a typical July.
- Record high
- 102°39° (2026)
- Record low
- 40°4° (2010)
- Heating degree days
- 14
- Cooling degree days
- 210
Atlantic City in August
Highs average 85°29° and lows 55°13°, with 0.85 in22 mm of precipitation in a typical August.
- Record high
- 101°38° (2026)
- Record low
- 38°3° (2009)
- Heating degree days
- 30
- Cooling degree days
- 182
Atlantic City in September
Highs average 74°23° and lows 46°8°, with 1 in26 mm of precipitation in a typical September.
- Record high
- 97°36° (2022)
- Record low
- 23°−5° (2020)
- Heating degree days
- 199
- Cooling degree days
- 42
Atlantic City in OctoberThis month
Highs average 58°14° and lows 33°1°, with 1.6 in40 mm of precipitation in a typical October.
- Record high
- 85°29° (2026)
- Record low
- −7°−22° (2020)
- Heating degree days
- 600
- Cooling degree days
- 1
Atlantic City in November
Highs average 44°7° and lows 23°−5°, with 0.98 in25 mm of precipitation in a typical November.
- Record high
- 71°22° (2025)
- Record low
- −13°−25° (2014)
- Heating degree days
- 947
- Cooling degree days
- 0
Atlantic City in December
Highs average 34°1° and lows 14°−10°, with 0.91 in23 mm of precipitation in a typical December.
- Record high
- 66°19° (2021)
- Record low
- −29°−34° (2022)
- Heating degree days
- 1264
- Cooling degree days
- 0