As of 06:40 MDT

Boise, ID weather in May

63°

Boise, Sunday, 9 August, 06:40

Clear. Feels like 61°. High 96°, low 62°.

Pressure29.91 inHg

Wind2 mph SE

Humidity47%

Visibility6.2 mi

Dew point43°

See detailed hourly forecast

In May, Boise, ID averages a high of 71° and a low of 46.8°. About 1.2 inches of precipitation fall over the month (6 wet days). The record high is 99.9° (2025) and the record low 27.7° (1970). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	66.6°	41.2°	12%	87.1° (1985)	30.6° (1972)
2	67.8°	43.2°	15%	85.1° (1966)	29.5° (1997)
3	68.2°	43.3°	20%	89.4° (1966)	30.9° (1965)
4	67.1°	43.3°	17%	90.5° (1966)	29.1° (1964)
5	68.2°	44.2°	20%	91.2° (1966)	31.8° (1982)
6	67.8°	44.4°	23%	88.9° (2021)	29.5° (1964)
7	67.3°	44.4°	23%	89.8° (1987)	29.7° (1984)
8	68.2°	43.7°	23%	90.3° (1987)	33.8° (2002)
9	68°	44.8°	18%	86.7° (2025)	32.5° (1999)
10	68°	44.1°	20%	88.7° (2025)	28.4° (2022)
11	69.1°	44.6°	20%	89.6° (1960)	27.7° (1970)
12	70.7°	45.3°	18%	92.7° (2013)	32.5° (1983)
13	71.2°	46°	15%	92.7° (2013)	33.8° (2017)
14	72°	47.5°	20%	87.6° (1972)	31.1° (1970)
15	72°	47.1°	20%	91.4° (2006)	35.4° (1966)
16	71.4°	47.8°	25%	91.8° (2006)	32.7° (1974)
17	71.8°	48°	22%	91.2° (2008)	34.3° (2017)
18	71.6°	47.8°	17%	94.1° (2009)	34.7° (1971)
19	71.8°	47.8°	18%	90.1° (2002)	32.5° (2003)
20	70.9°	48°	30%	90.5° (2023)	36.9° (1971)
21	71.8°	47.1°	25%	90.9° (2023)	39.2° (2024)
22	72°	48°	23%	89.6° (1988)	31.3° (1960)
23	72.5°	47.8°	7%	91.6° (2001)	33.4° (2010)
24	73°	48.9°	12%	96.1° (2003)	36.5° (2010)
25	74.3°	48.9°	23%	90.9° (1961)	30.2° (1975)
26	73.8°	50.4°	20%	93.6° (1966)	38.7° (1978)
27	75.2°	50.9°	17%	93.9° (1986)	40.1° (1973)
28	74.8°	50.4°	17%	98.4° (2003)	37° (2011)
29	74.5°	50.4°	18%	94.5° (2003)	39.6° (2011)
30	74.8°	50.5°	17%	99.5° (2020)	38.8° (1996)
31	76.3°	51.1°	18%	99.9° (2025)	40.3° (1978)