Weather on August 21
Billings, MT
55 Years of Data
Avg High
86°F
Avg Low
54°F
Warmest
1971
78°F avg
Coldest
2018
55°F avg
About This Date
August 21st in Billings, MT typically brings warm summer weather, with average highs around 86°F and lows near 54°F — a 32°F daily swing. Over 55 years of records, the warmest August 21st was in 1971 (78°F average), while the coldest was 2018 (55°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 25% of August 21st dates historically, with the wettest August 21st recording 0.76" of rain. The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 4.7°F cooler on this date compared to 20-30 years ago.
Planning for August 21st in Billings, MT? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 94° | 62° | 78° | — | — |
| 2024 | 92° | 54° | 73° | — | — |
| 2023 | 63° | 57° | 60° | 0.69" | — |
| 2022 | 90° | 58° | 74° | — | — |
| 2021 | 68° | 48° | 58° | 0.2" | — |
| 2020 | 91° | 57° | 74° | — | — |
| 2019 | 83° | 56° | 69° | — | — |
| 2018coldest | 59° | 50° | 55° | 0.48" | — |
| 2017 | 83° | 52° | 67° | — | — |
| 2016 | 81° | 47° | 64° | — | — |
| 2015 | 84° | 50° | 67° | — | — |
| 2014 | 84° | 59° | 72° | 0.28" | — |
| 2013 | 94° | 57° | 75° | — | — |
| 2012 | 95° | 52° | 73° | — | — |
| 2011 | 93° | 54° | 73° | — | — |
| 2010 | 100° | 53° | 77° | — | — |
| 2009 | 87° | 52° | 69° | — | — |
| 2008 | 89° | 56° | 72° | — | — |
| 2007 | 83° | 54° | 68° | 0.2" | — |
| 2006 | 87° | 55° | 71° | — | — |
| 2005 | 94° | 53° | 73° | — | — |
| 2004 | 87° | 57° | 72° | — | — |
| 2003 | 91° | 57° | 74° | — | — |
| 2002 | 83° | 55° | 69° | — | — |
| 2001 | 89° | 54° | 71° | — | — |
| 2000 | 82° | 51° | 67° | — | — |
| 1999 | 91° | 59° | 75° | 0.25" | — |
| 1998 | 91° | 53° | 72° | — | — |
| 1997 | 89° | 60° | 75° | — | — |
| 1996 | 91° | 52° | 71° | — | — |
| 1995 | 98° | 51° | 75° | — | — |
| 1994 | 96° | 50° | 73° | — | — |
| 1993 | 89° | 55° | 72° | — | — |
| 1992 | 77° | 56° | 66° | — | — |
| 1991 | 94° | 56° | 75° | — | — |
| 1990 | 88° | 58° | 73° | 0.51" | — |
| 1989 | 80° | 50° | 65° | 0.76" | — |
| 1988 | 77° | 46° | 62° | — | — |
| 1987 | 92° | 52° | 72° | — | — |
| 1986 | 80° | 60° | 70° | 0.13" | — |
| 1985 | 83° | 56° | 69° | — | — |
| 1984 | 86° | 44° | 65° | — | — |
| 1983 | 85° | 60° | 72° | 0.2" | — |
| 1982 | 92° | 63° | 77° | — | — |
| 1981 | 95° | 59° | 77° | — | — |
| 1980 | 76° | 48° | 62° | — | — |
| 1979 | 83° | 50° | 66° | — | — |
| 1978 | 86° | 49° | 67° | — | — |
| 1977 | 85° | 56° | 70° | — | — |
| 1976 | 90° | 49° | 69° | — | — |
| 1975 | 83° | 58° | 70° | 0.03" | — |
| 1974 | 76° | 45° | 60° | 0.15" | — |
| 1973 | 98° | 57° | 78° | 0.28" | — |
| 1972 | 81° | 53° | 67° | 0.05" | — |
| 1971warmest | 98° | 58° | 78° | — | — |
55 years of data from BILLINGS WTP