As of 21:52 MDT

Thornton, CO weather in August

81°

Thornton, Saturday, 8 August, 21:52

Overcast. Feels like 80°. High 97°, low 66°.

Pressure29.83 inHg

Wind2 mph W

Humidity25%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

In August, Thornton, CO averages a high of 83.5° and a low of 58°. About 1.6 inches of precipitation fall over the month (8 wet days). The record high is 99.9° (2025) and the record low 42.1° (2004). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	84.7°	59.5°	30%	98.2° (2008)	46.4° (1965)
2	84.2°	59.5°	35%	97.9° (2008)	50.2° (1965)
3	83.3°	59.4°	40%	95.4° (2024)	52° (1973)
4	84.2°	58.8°	33%	99.3° (2024)	50.7° (1974)
5	84.4°	59.2°	38%	99.9° (2025)	49.8° (1978)
6	84.9°	59.2°	22%	97.5° (2025)	50.7° (1998)
7	84.6°	58.8°	25%	99.5° (2025)	49.1° (1997)
8	84.2°	58.8°	30%	98.6° (2025)	51.1° (1971)
9	83.1°	58.3°	28%	96.3° (2020)	51.4° (1974)
10	82.9°	58.3°	32%	95.2° (1962)	49.3° (1974)
11	84.6°	58.3°	13%	95.9° (2022)	50.4° (1974)
12	83.5°	58.6°	27%	94.3° (1972)	50.4° (2004)
13	82.9°	57.9°	23%	97.7° (2025)	50.2° (2004)
14	82.8°	57.9°	32%	98.2° (2025)	51.6° (1976)
15	83.7°	57.6°	23%	95° (1988)	49.8° (1978)
16	83.7°	57.4°	25%	95.7° (2002)	48.4° (1968)
17	83.8°	58.1°	20%	95.4° (2024)	52° (1975)
18	83.7°	58.3°	37%	97° (2020)	49.6° (1960)
19	82.6°	57.4°	28%	94.1° (2019)	46.2° (1978)
20	83.1°	57.2°	23%	97.2° (2023)	48.6° (2016)
21	83.8°	57.6°	15%	99.3° (2023)	47.7° (1964)
22	83.3°	58.3°	27%	97.7° (2020)	47.5° (1964)
23	83.3°	57.6°	18%	97.3° (2020)	49.6° (1965)
24	83.1°	57.4°	20%	97.2° (2020)	46.8° (1968)
25	83.5°	57.2°	18%	97° (2020)	46.2° (1972)
26	83.3°	57.6°	28%	93.6° (2020)	48.4° (1992)
27	82.6°	57.6°	15%	94.3° (2020)	43.9° (1992)
28	82.4°	56.7°	20%	91.4° (2024)	42.1° (2004)
29	83.1°	56.3°	13%	93° (2012)	47.1° (2004)
30	82.8°	56.5°	20%	93.6° (2021)	47.1° (1968)
31	82°	56.1°	15%	95° (2023)	46° (1968)