As of 05:15 MDT

Longmont, CO weather in August

69°

Longmont, Sunday, 9 August, 05:15

Partly cloudy. Feels like 67°. High 97°, low 69°.

Pressure29.88 inHg

Wind2 mph SW

Humidity38%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

In August, Longmont, CO averages a high of 82.5° and a low of 57.2°. About 1.7 inches of precipitation fall over the month (7 wet days). The record high is 98.8° (2025) and the record low 41.7° (2004). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	83.7°	58.6°	32%	97.7° (2008)	48.4° (1965)
2	82.9°	58.6°	25%	97.7° (2008)	50.5° (1965)
3	82.2°	58.6°	38%	95.7° (2024)	51.3° (1978)
4	82.9°	58.1°	28%	95.5° (2024)	50.9° (1974)
5	83.3°	58.1°	40%	97.2° (2025)	50.5° (1978)
6	84°	58.6°	25%	97.3° (2025)	50.7° (1993)
7	83.8°	58.1°	17%	98.8° (2025)	50.7° (1971)
8	83.1°	58.3°	23%	97.5° (2025)	50.4° (1971)
9	81.9°	57.9°	30%	95.9° (2020)	51.1° (1966)
10	81.7°	57.2°	22%	93.6° (1962)	48.7° (1974)
11	83.7°	57.6°	18%	93.6° (2000)	49.1° (1974)
12	82.6°	57.9°	25%	93.4° (1996)	50° (1997)
13	81.9°	57°	18%	95.2° (2007)	49.3° (2004)
14	81.9°	57.2°	32%	96.6° (2025)	51.3° (2004)
15	82.6°	56.8°	23%	95.2° (2015)	49.6° (1978)
16	82.8°	56.5°	25%	95.4° (2002)	49.8° (2008)
17	82.8°	57.2°	22%	93.9° (2024)	51.3° (1968)
18	82.6°	57.4°	23%	96.3° (2020)	49.8° (1960)
19	81.7°	56.8°	32%	93.4° (2019)	45.1° (1978)
20	82.4°	56.3°	22%	95.2° (2013)	48.4° (2016)
21	82.9°	56.8°	20%	94.6° (2025)	48.4° (1980)
22	82.4°	57.6°	17%	97.3° (2020)	46.9° (1964)
23	82.2°	56.7°	23%	96.4° (2020)	48° (1964)
24	82.4°	56.7°	22%	96.1° (2020)	46.8° (1968)
25	82.2°	56.5°	8%	94.8° (2020)	47.7° (1964)
26	82.2°	56.5°	28%	92.5° (2007)	48.4° (1992)
27	81.5°	56.8°	20%	93.7° (2020)	43.3° (1992)
28	81.5°	55.8°	17%	91.8° (2011)	41.7° (2004)
29	82.2°	55.6°	18%	94.1° (2012)	46.9° (2004)
30	81.7°	55.6°	15%	92.5° (1990)	45.7° (1964)
31	81°	55.2°	20%	93.6° (2011)	45.9° (1968)