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Boise, ID Weather on May 27
Boise hit 94°F on May 27, 1983—hottest on record
May 27th in Boise typically brings pleasant spring weather with an average high near 75°F, but the date has witnessed dramatic temperature swings across 55 years of records. The extreme record high of 94°F set in 1983 shows how quickly early summer heat can arrive in the Boise Valley, while a record low of just 32°F in 1991 demonstrates the unpredictable late-spring cold snaps that can still threaten the region.
What to Expect on May 27
Planning for May 27th in Boise, ID? Great weather for outdoor activities.
Frequently Asked Questions
What was the warmest May 27 ever in Boise?
The warmest May 27 in Boise, ID reached 94°F in 1983. That is 18°F above the long-term average high of 76°F.
What was the coldest May 27 ever in Boise?
The coldest May 27 in Boise, ID dropped to 32°F in 1991. That is 17°F below the long-term average low of 49°F.
What is the average temperature on May 27 in Boise?
On May 27, Boise averages a high of 76°F and a low of 49°F based on 55 years of NOAA weather observations from BOISE AIR TERMINAL.
How many years of weather data are available for May 27 in Boise?
We have 55 years of weather records for May 27 in Boise, ID, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
May 27 Weather History in Boise
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 82°F | 53°F | 0" | -- |
| 2024 | 85°F | 50°F | 0" | -- |
| 2023 | 76°F | 53°F | 0" | -- |
| 2022 | 78°F | 56°F | 0.3" | -- |
| 2021 | 82°F | 52°F | 0" | -- |
| 2020 | 83°F | 53°F | 0" | -- |
| 2019 | 74°F | 48°F | 0.08" | -- |
| 2018 | 83°F | 50°F | 0.48" | -- |
| 2017 | 78°F | 49°F | 0" | -- |
| 2016 | 69°F | 50°F | 0" | -- |
| 2015 | 76°F | 54°F | 0.18" | -- |
| 2014 | 86°F | 50°F | 0" | -- |
| 2013 | 66°F | 45°F | 0.74" | -- |
| 2012 | 65°F | 49°F | 0" | -- |
| 2011 | 56°F | 42°F | 0.97" | -- |
| 2010 | 63°F | 48°F | 0.3" | -- |
| 2009 | 84°F | 52°F | 0" | -- |
| 2008 | 72°F | 55°F | 0.1" | -- |
| 2007 | 83°F | 59°F | 0" | -- |
| 2006 | 55°F | 42°F | 1.19" | -- |
| 2005 | 85°F | 54°F | 0" | -- |
| 2004 | 68°F | 53°F | 1.17" | -- |
| 2003 | 89°F | 57°F | 0" | -- |
| 2002 | 87°F | 53°F | 0" | -- |
| 2001 | 91°F | 59°F | 0" | -- |
| 2000 | 81°F | 58°F | 0.05" | -- |
| 1999 | 89°F | 51°F | 0" | -- |
| 1998 | 60°F | 43°F | 0.25" | -- |
| 1997 | 71°F | 51°F | 0" | -- |
| 1996 | 73°F | 47°F | 0" | -- |
| 1995 | 71°F | 38°F | 0" | -- |
| 1994 | 68°F | 49°F | 0.1" | -- |
| 1993 | 80°F | 54°F | 0" | -- |
| 1992 | 78°F | 47°F | 0" | -- |
| 1991 | 68°F | 32°F | 0" | -- |
| 1990 | 73°F | 54°F | 0.66" | -- |
| 1989 | 76°F | 46°F | 0" | -- |
| 1988 | 76°F | 55°F | 0" | -- |
| 1987 | 66°F | 48°F | 0" | -- |
| 1986 | 93°F | 55°F | 0" | -- |
| 1985 | 80°F | 47°F | 0.03" | -- |
| 1984 | 70°F | 38°F | 0" | -- |
| 1983 | 94°F | 57°F | 0" | -- |
| 1982 | 60°F | 43°F | 0" | -- |
| 1981 | 76°F | 43°F | 0" | -- |
| 1980 | 60°F | 44°F | 0" | -- |
| 1979 | 69°F | 50°F | 0" | -- |
| 1978 | 72°F | 49°F | 0" | -- |
| 1977 | 59°F | 41°F | 0" | -- |
| 1976 | 90°F | 55°F | 0" | -- |
| 1975 | 70°F | 45°F | 0" | -- |
| 1974 | 79°F | 53°F | 0" | -- |
| 1973 | 71°F | 40°F | 0" | -- |
| 1972 | 84°F | 49°F | 0" | -- |
| 1971 | 83°F | 51°F | 0" | -- |
Based on 55 years of data from NOAA station: BOISE AIR TERMINAL
How Has May 27 Changed?
Temperatures on this date have remained relatively stable over the past several decades.
Monthly Climate Averages
Historical temperature and precipitation averages for Boise, ID, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.