As of 19:21 MDT

Boulder, CO weather in August

87°

Boulder, Saturday, 8 August, 19:21

Overcast. Feels like 84°. High 96°, low 66°.

Pressure29.71 inHg

Wind2 mph S

Humidity21%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

In August, Boulder, CO averages a high of 81.5° and a low of 56.2°. About 2.8 inches of precipitation fall over the month (15 wet days). The record high is 97.9° (2025) and the record low 40.5° (2004). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.8°	57.4°	55%	97.2° (2008)	45.5° (1965)
2	82°	57.6°	58%	96.6° (2008)	48.9° (1973)
3	81.3°	57.7°	62%	94.1° (2024)	51.3° (1973)
4	81.9°	57°	67%	95.9° (2024)	50.4° (1974)
5	82.4°	57.2°	57%	95.7° (2025)	50° (1976)
6	82.9°	57.4°	43%	96.6° (2025)	49.3° (1993)
7	82.8°	57.2°	47%	97.9° (2025)	48.6° (1997)
8	82°	57°	50%	96.3° (2025)	49.5° (1971)
9	81°	56.7°	52%	92.5° (2020)	48.7° (2023)
10	81°	56.1°	50%	92.7° (1962)	48.9° (1974)
11	82.6°	56.7°	43%	92.3° (2000)	48.2° (1974)
12	81.7°	56.8°	55%	91.9° (1996)	48.9° (2004)
13	80.8°	55.8°	55%	96.4° (2025)	48.2° (1966)
14	80.8°	56.1°	53%	96.4° (2025)	50° (2004)
15	81.7°	55.8°	38%	93.9° (2025)	47.7° (1978)
16	81.9°	55.4°	45%	94.3° (2002)	47.8° (1968)
17	81.9°	56.1°	45%	93.6° (2024)	49.5° (1968)
18	81.7°	56.5°	50%	93.7° (2020)	47.1° (1960)
19	80.6°	55.9°	55%	91° (2019)	44.1° (1978)
20	81.5°	55.2°	53%	93.7° (2013)	48.2° (1979)
21	81.9°	55.9°	53%	94.5° (2023)	47.5° (1980)
22	81.5°	56.5°	50%	94.1° (2020)	45.5° (1964)
23	81.1°	55.8°	47%	94.8° (2020)	46.9° (1964)
24	81.3°	55.6°	37%	93° (2020)	44.4° (1968)
25	81.3°	55.6°	50%	94.5° (2019)	47.3° (1972)
26	81.1°	55.6°	48%	91.2° (1994)	48° (1992)
27	80.6°	55.9°	42%	91.6° (2012)	42.6° (1992)
28	80.6°	54.9°	57%	90.3° (2013)	40.5° (2004)
29	81.1°	54.5°	40%	92.7° (2012)	46° (2004)
30	80.6°	54.5°	40%	90.7° (2005)	43.5° (1964)
31	80.2°	54.5°	42%	92.8° (2011)	44.2° (1968)