Weather on March 21
Green Bay, WI
55 Years of Data
Avg High
42°F
Avg Low
26°F
Warmest
2012
69°F avg
Coldest
1989
15°F avg
About This Date
March 21st in Green Bay, WI typically brings chilly spring weather, with average highs around 42°F and lows near 26°F. Over 56 years of records, the warmest March 21st was in 2012 (69°F average), while the coldest was 1989 (15°F) — a 54°F range across recorded history. Precipitation has occurred on 34% of recorded March 21st dates, with snow falling 18% of the time (heaviest snowfall: 4"). The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.2°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Green Bay, WI? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Warming Trend
1.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 52° | 31° | 41° | — | — |
| 2025 | 53° | 30° | 42° | — | — |
| 2024 | 36° | 15° | 26° | 0.05" | 0.5" |
| 2023 | 36° | 25° | 31° | — | — |
| 2022 | 47° | 34° | 40° | 0.05" | — |
| 2021 | 63° | 32° | 47° | — | — |
| 2020 | 31° | 19° | 25° | — | — |
| 2019 | 49° | 36° | 42° | — | — |
| 2018 | 36° | 21° | 29° | — | — |
| 2017 | 44° | 23° | 34° | — | — |
| 2016 | 45° | 28° | 37° | — | — |
| 2015 | 44° | 27° | 36° | 0.03" | — |
| 2014 | 39° | 22° | 31° | — | — |
| 2013 | 30° | 11° | 20° | — | — |
| 2012warmest | 82° | 55° | 69° | — | — |
| 2011 | 45° | 35° | 40° | — | — |
| 2010 | 49° | 27° | 38° | — | — |
| 2009 | 53° | 32° | 43° | 0.28" | 0.6" |
| 2008 | 32° | 26° | 29° | — | — |
| 2007 | 59° | 34° | 46° | 1.85" | — |
| 2006 | 37° | 24° | 31° | — | — |
| 2005 | 39° | 21° | 30° | — | — |
| 2004 | 29° | 18° | 23° | — | — |
| 2003 | 39° | 33° | 36° | 1.07" | 1.2" |
| 2002 | 23° | 11° | 17° | 0.1" | 1.4" |
| 2001 | 46° | 28° | 37° | — | — |
| 2000 | 50° | 35° | 43° | 0.08" | — |
| 1999 | 39° | 27° | 33° | — | — |
| 1998 | 37° | 22° | 29° | — | — |
| 1997 | 52° | 32° | 42° | — | — |
| 1996 | 36° | 16° | 26° | — | — |
| 1995 | 46° | 36° | 41° | — | — |
| 1994 | 54° | 34° | 44° | 0.64" | — |
| 1993 | 38° | 28° | 33° | — | — |
| 1992 | 28° | 18° | 23° | 0.18" | 0.7" |
| 1991 | 53° | 35° | 44° | 0.18" | — |
| 1990 | 42° | 29° | 35° | 0.05" | — |
| 1989coldest | 25° | 6° | 15° | — | — |
| 1988 | 31° | 13° | 22° | — | — |
| 1987 | 53° | 26° | 40° | — | — |
| 1986 | 35° | 5° | 20° | — | — |
| 1985 | 44° | 19° | 32° | — | — |
| 1984 | 35° | 30° | 33° | 1.02" | 2.4" |
| 1983 | 26° | 15° | 21° | 0.05" | 0.7" |
| 1982 | 38° | 32° | 35° | 0.18" | 1.1" |
| 1981 | 44° | 25° | 34° | — | — |
| 1980 | 39° | 26° | 33° | — | — |
| 1979 | 40° | 32° | 36° | — | — |
| 1978 | 42° | 31° | 36° | — | — |
| 1977 | 35° | 25° | 30° | 0.33" | 2" |
| 1976 | 34° | 15° | 24° | — | — |
| 1975 | 39° | 33° | 36° | 2.34" | — |
| 1974 | 33° | 17° | 25° | — | — |
| 1973 | 43° | 21° | 32° | — | — |
| 1972 | 45° | 36° | 40° | 0.33" | — |
| 1971 | 32° | 20° | 26° | 0.28" | 4" |
56 years of data from GREEN BAY