Weather on April 21
Green Bay, WI
55 Years of Data
Avg High
57°F
Avg Low
37°F
Warmest
1985
72°F avg
Coldest
1986
34°F avg
About This Date
April 21st in Green Bay, WI typically brings cool spring weather, with average highs around 57°F and lows near 37°F. Over 55 years of records, the warmest April 21st was in 1985 (72°F average), while the coldest was 1986 (34°F) — a 38°F range across recorded history. Precipitation has occurred on 38% of recorded April 21st dates, with snow falling 5% of the time (heaviest snowfall: 3.8"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for April 21st in Green Bay, WI? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Cooling Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 50° | 38° | 44° | 0.97" | — |
| 2024 | 59° | 32° | 46° | — | — |
| 2023 | 55° | 36° | 45° | — | — |
| 2022 | 60° | 42° | 51° | 0.03" | — |
| 2021 | 43° | 27° | 35° | 0.15" | 0.5" |
| 2020 | 43° | 30° | 37° | — | — |
| 2019 | 74° | 48° | 61° | — | — |
| 2018 | 52° | 28° | 40° | — | — |
| 2017 | 60° | 39° | 50° | — | — |
| 2016 | 69° | 48° | 59° | 0.58" | — |
| 2015 | 46° | 34° | 40° | 0.03" | — |
| 2014 | 69° | 44° | 57° | 0.05" | — |
| 2013 | 42° | 27° | 35° | 0.03" | — |
| 2012 | 52° | 31° | 41° | — | — |
| 2011 | 47° | 27° | 37° | — | — |
| 2010 | 49° | 35° | 42° | — | — |
| 2009 | 41° | 33° | 37° | 0.56" | 0.2" |
| 2008 | 70° | 42° | 56° | — | — |
| 2007 | 74° | 40° | 57° | — | — |
| 2006 | 64° | 42° | 53° | 0.03" | — |
| 2005 | 57° | 32° | 45° | — | — |
| 2004 | 48° | 39° | 44° | 0.23" | — |
| 2003 | 47° | 37° | 42° | 0.13" | — |
| 2002 | 40° | 32° | 36° | 0.53" | 3.8" |
| 2001 | 77° | 51° | 64° | — | — |
| 2000 | 59° | 31° | 45° | — | — |
| 1999 | 53° | 43° | 48° | 0.05" | — |
| 1998 | 64° | 34° | 49° | — | — |
| 1997 | 53° | 29° | 41° | — | — |
| 1996 | 65° | 40° | 52° | — | — |
| 1995 | 42° | 37° | 40° | 0.2" | — |
| 1994 | 58° | 31° | 44° | — | — |
| 1993 | 57° | 26° | 42° | — | — |
| 1992 | 61° | 41° | 51° | 0.03" | — |
| 1991 | 53° | 32° | 43° | — | — |
| 1990 | 70° | 40° | 55° | — | — |
| 1989 | 58° | 35° | 46° | — | — |
| 1988 | 55° | 22° | 38° | — | — |
| 1987 | 68° | 40° | 54° | 0.61" | — |
| 1986coldest | 43° | 26° | 34° | — | — |
| 1985warmest | 82° | 62° | 72° | — | — |
| 1984 | 48° | 38° | 43° | — | — |
| 1983 | 63° | 32° | 47° | — | — |
| 1982 | 51° | 27° | 39° | — | — |
| 1981 | 50° | 25° | 37° | — | — |
| 1980 | 77° | 47° | 62° | — | — |
| 1979 | 66° | 41° | 54° | — | — |
| 1978 | 51° | 26° | 39° | — | — |
| 1977 | 65° | 45° | 55° | 1.45" | — |
| 1976 | 45° | 41° | 43° | 0.86" | — |
| 1975 | 52° | 27° | 39° | — | — |
| 1974 | 71° | 53° | 62° | 0.03" | — |
| 1973 | 72° | 61° | 66° | 0.1" | — |
| 1972 | 49° | 32° | 40° | 0.91" | — |
| 1971 | 54° | 38° | 46° | — | — |
55 years of data from GREEN BAY