Weather on May 21
Billings, MT
55 Years of Data
Avg High
72°F
Avg Low
44°F
Warmest
2002
75°F avg
Coldest
1975
43°F avg
About This Date
May 21st in Billings, MT typically brings pleasant spring weather, with average highs around 72°F and lows near 44°F — a 28°F daily swing. Over 55 years of records, the warmest May 21st was in 2002 (75°F average), while the coldest was 1975 (43°F) — a 32°F range across recorded history. Rain or other precipitation has occurred on about 33% of May 21st dates historically, with the wettest May 21st recording 2.64" of rain. The last decade has been 5.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 5.7°F cooler on this date compared to 20-30 years ago.
Planning for May 21st in Billings, MT? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 67° | 44° | 55° | 0.08" | — |
| 2024 | 61° | 42° | 51° | 0.74" | — |
| 2023 | 87° | 50° | 69° | — | — |
| 2022 | 51° | 37° | 44° | — | — |
| 2021 | 70° | 33° | 51° | 0.36" | — |
| 2020 | 73° | 41° | 57° | 0.23" | — |
| 2019 | 46° | 40° | 43° | 0.05" | — |
| 2018 | 71° | 48° | 60° | — | — |
| 2017 | 67° | 44° | 55° | — | — |
| 2016 | 68° | 50° | 59° | — | — |
| 2015 | 61° | 36° | 48° | — | — |
| 2014 | 67° | 40° | 53° | — | — |
| 2013 | 68° | 40° | 54° | — | — |
| 2012 | 87° | 49° | 68° | — | — |
| 2011 | 58° | 50° | 54° | 2.64" | — |
| 2010 | 67° | 39° | 53° | — | — |
| 2009 | 70° | 39° | 54° | — | — |
| 2008 | 87° | 48° | 68° | 0.97" | — |
| 2007 | 78° | 38° | 58° | — | — |
| 2006 | 81° | 49° | 65° | 0.48" | — |
| 2005 | 77° | 53° | 65° | — | — |
| 2004 | 73° | 44° | 59° | — | — |
| 2003 | 69° | 45° | 57° | — | — |
| 2002warmest | 92° | 59° | 75° | — | — |
| 2001 | 67° | 42° | 54° | — | — |
| 2000 | 77° | 47° | 62° | — | — |
| 1999 | 78° | 46° | 62° | — | — |
| 1998 | 65° | 34° | 49° | 1.27" | — |
| 1997 | 78° | 52° | 65° | — | — |
| 1996 | 71° | 36° | 53° | — | — |
| 1995 | 72° | 46° | 59° | — | — |
| 1994 | 74° | 43° | 58° | — | — |
| 1993 | 79° | 54° | 66° | — | — |
| 1992 | 55° | 45° | 50° | 1.83" | — |
| 1991 | 79° | 49° | 64° | — | — |
| 1990 | 74° | 44° | 59° | — | — |
| 1989 | 75° | 40° | 57° | — | — |
| 1988 | 72° | 43° | 57° | — | — |
| 1987 | 48° | 37° | 43° | 0.15" | — |
| 1986 | 87° | 49° | 68° | — | — |
| 1985 | 86° | 47° | 66° | — | — |
| 1984 | 84° | 46° | 65° | 0.1" | — |
| 1983 | 70° | 45° | 57° | — | — |
| 1982 | 74° | 41° | 57° | — | — |
| 1981 | 75° | 47° | 61° | 0.69" | — |
| 1980 | 90° | 49° | 69° | — | — |
| 1979 | 80° | 41° | 61° | — | — |
| 1978 | 78° | 44° | 61° | — | — |
| 1977 | 72° | 44° | 58° | — | — |
| 1976 | 74° | 41° | 57° | — | — |
| 1975coldest | 48° | 37° | 43° | 0.69" | — |
| 1974 | 51° | 37° | 44° | 0.25" | — |
| 1973 | 75° | 41° | 58° | 0.28" | — |
| 1972 | 70° | 48° | 59° | 2.46" | — |
| 1971 | 61° | 44° | 52° | 0.13" | — |
55 years of data from BILLINGS WTP