Circle weather by month
What a typical year looks like in Circle, Montana: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Brockway 3 Wsw, 23 km from Circle; records cover 1959–2026.
The year at a glance
- Precipitation a year
- 12.5 in316 mm
- Snow a year
- Rare
- Last spring freeze
- May 17
- First fall freeze
- Sep 18
- Heating degree days
- 8,116
- Cooling degree days
- 488
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are −22°−30° (heating, 99%) and 99°37° (cooling, 1%).
Month by month
Circle in January
Highs average 29°−2° and lows 7°−14°, with 0.24 in6.1 mm of precipitation in a typical January.
- Record high
- 68°20° (1992)
- Record low
- −44°−42° (1969)
- Heating degree days
- 1457
- Cooling degree days
- 0
Circle in February
Highs average 33°0° and lows 11°−12°, with 0.18 in4.6 mm of precipitation in a typical February.
- Record high
- 71°22° (1992)
- Record low
- −47°−44° (1962)
- Heating degree days
- 1218
- Cooling degree days
- 0
Circle in March
Highs average 45°7° and lows 21°−6°, with 0.29 in7.4 mm of precipitation in a typical March.
- Record high
- 84°29° (2004)
- Record low
- −36°−38° (1996)
- Heating degree days
- 1004
- Cooling degree days
- 0
Circle in April
Highs average 57°14° and lows 31°−1°, with 1.2 in29 mm of precipitation in a typical April.
- Record high
- 91°33° (1980)
- Record low
- −9°−23° (1986)
- Heating degree days
- 641
- Cooling degree days
- 0
Circle in May
Highs average 67°19° and lows 40°5°, with 2.5 in63 mm of precipitation in a typical May.
- Record high
- 101°38° (1988)
- Record low
- 12°−11° (1984)
- Heating degree days
- 364
- Cooling degree days
- 9
Circle in June
Highs average 76°25° and lows 50°10°, with 2.5 in65 mm of precipitation in a typical June.
- Record high
- 110°43° (1988)
- Record low
- 24°−4° (2004)
- Heating degree days
- 115
- Cooling degree days
- 59
Circle in July
Highs average 85°30° and lows 56°13°, with 2.1 in53 mm of precipitation in a typical July.
- Record high
- 108°42° (1960)
- Record low
- 33°1° (1971)
- Heating degree days
- 24
- Cooling degree days
- 195
Circle in August
Highs average 85°29° and lows 54°12°, with 1.1 in29 mm of precipitation in a typical August.
- Record high
- 108°42° (1995)
- Record low
- 25°−4° (1994)
- Heating degree days
- 42
- Cooling degree days
- 183
Circle in September
Highs average 73°23° and lows 44°7°, with 1.1 in27 mm of precipitation in a typical September.
- Record high
- 104°40° (2022)
- Record low
- 14°−10° (1995)
- Heating degree days
- 230
- Cooling degree days
- 40
Circle in OctoberThis month
Highs average 57°14° and lows 32°0°, with 0.86 in22 mm of precipitation in a typical October.
- Record high
- 94°34° (1992)
- Record low
- −10°−23° (1991)
- Heating degree days
- 633
- Cooling degree days
- 2
Circle in November
Highs average 43°6° and lows 20°−7°, with 0.21 in5.3 mm of precipitation in a typical November.
- Record high
- 78°26° (1999)
- Record low
- −35°−37° (1993)
- Heating degree days
- 1018
- Cooling degree days
- 0
Circle in December
Highs average 31°0° and lows 10°−12°, with 0.2 in5.1 mm of precipitation in a typical December.
- Record high
- 68°20° (1979)
- Record low
- −43°−42° (1963)
- Heating degree days
- 1370
- Cooling degree days
- 0