As of 13:52 MDT

Lewistown, MT weather in May

73°

Lewistown, Monday, 19 October, 13:52

Partly cloudy. Feels like 71°. High 73°, low 33°.

Pressure29.88 inHg

Wind5 mph SW

Humidity23%

Visibility6.2 mi

Dew point33°

See detailed hourly forecast

In May, Lewistown, MT averages a high of 61° and a low of 40.4°. About 3.6 inches of precipitation fall over the month (14 wet days). The record high is 86.4° (1980) and the record low 4.3° (1967). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	54.7°	33.8°	25%	78.3° (1981)	11.8° (2009)
2	58.1°	35.2°	40%	80.1° (1985)	13.8° (2009)
3	59°	36.7°	32%	77° (1986)	4.3° (1967)
4	59°	37.8°	33%	78.3° (2016)	8.1° (1967)
5	59.4°	37.8°	47%	79.7° (1992)	15.4° (1967)
6	59.2°	38.8°	40%	81.7° (1966)	25.9° (2010)
7	57.6°	38.3°	52%	80.8° (1992)	25.7° (2010)
8	57°	37.8°	45%	79.5° (1987)	14.2° (2010)
9	57.2°	37.8°	52%	77.2° (1987)	13.3° (2002)
10	56.5°	37.2°	55%	79.9° (2025)	19.2° (2002)
11	57°	36.5°	45%	80.8° (1960)	22.1° (2002)
12	58.8°	37.9°	43%	85.1° (1960)	20.8° (1967)
13	60.8°	38.8°	38%	84° (2013)	15.6° (1967)
14	61.5°	39°	28%	78.8° (1984)	17.4° (1995)
15	62.8°	40.8°	37%	83.5° (1987)	24.1° (1983)
16	63.1°	41.5°	45%	80.4° (1988)	24.6° (1983)
17	62.8°	42.6°	43%	79.5° (2006)	24.3° (1974)
18	61.9°	42.3°	52%	82.6° (2006)	28.2° (1965)
19	62.1°	41.2°	35%	83.8° (1992)	22.1° (2003)
20	63°	41.7°	52%	84.9° (1964)	23.7° (2003)
21	62.4°	41.9°	43%	86.4° (1980)	26.2° (2021)
22	63.1°	42.4°	43%	86.2° (1980)	23.5° (2022)
23	63°	43°	47%	80.4° (2014)	26.6° (1974)
24	63.1°	43°	52%	80.6° (1985)	26.2° (2002)
25	63.1°	43.2°	48%	81.9° (2003)	30.4° (2004)
26	64.2°	44.6°	50%	82.6° (1969)	31.8° (1965)
27	64.4°	45°	48%	83.7° (1966)	31.5° (2012)
28	64.9°	44.1°	42%	84° (2014)	29.8° (1982)
29	64.2°	43.9°	52%	84° (1988)	23.5° (2012)
30	63.5°	44.1°	48%	84.7° (1984)	30.4° (1982)
31	64.6°	44.4°	40%	82.9° (1986)	20.7° (1982)