As of 08:30 MDT

Thornton, CO weather in October

78°

Thornton, Sunday, 9 August, 08:30

Mostly clear. Feels like 77°. High 93°, low 70°.

Pressure29.85 inHg

Wind2 mph SW

Humidity33%

Visibility6.2 mi

Dew point46°

See detailed hourly forecast

In October, Thornton, CO averages a high of 63.5° and a low of 37.6°. About 1.5 inches of precipitation fall over the month (6 wet days). The record high is 88.2° (2025) and the record low -5.3° (1993). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	72.1°	45°	17%	86.4° (2023)	12° (1985)
2	71.6°	45°	13%	86.7° (2024)	22.5° (1985)
3	70.3°	44.2°	22%	88.2° (2025)	31.3° (2014)
4	68.5°	43.9°	23%	83.5° (1997)	31.3° (1969)
5	67.3°	43.3°	22%	84° (2024)	26.4° (1969)
6	66.6°	41.5°	22%	84.7° (2020)	13.8° (1969)
7	68.4°	41°	15%	82.6° (1979)	20.8° (1969)
8	66.9°	40.8°	23%	85.1° (2020)	21.4° (1970)
9	64.9°	39.9°	22%	83.3° (2020)	14.7° (1970)
10	66°	38.8°	22%	83.8° (2024)	19° (2009)
11	66.2°	39.6°	20%	82.4° (2015)	10.4° (2019)
12	64.9°	39.2°	22%	82.6° (1975)	17.8° (1969)
13	63.9°	38.5°	18%	81.5° (1962)	4.8° (1969)
14	64.8°	37.4°	20%	82.8° (2020)	6.4° (1969)
15	62.2°	37.2°	22%	80.8° (2016)	10.9° (1966)
16	63.5°	36.7°	20%	83.3° (1991)	15.6° (1969)
17	63.1°	36.9°	8%	82° (2023)	10.8° (1999)
18	61.9°	36.7°	18%	80.1° (2003)	20.8° (1966)
19	63.7°	36°	10%	82° (2003)	15.8° (1966)
20	63.9°	36.7°	12%	83.3° (2023)	17.4° (1969)
21	62.6°	36.5°	22%	79.5° (2003)	15.4° (1990)
22	61.3°	36.1°	17%	80.2° (2003)	23.2° (1996)
23	61.9°	35.8°	18%	80.6° (2003)	20.5° (2020)
24	60.6°	34.9°	20%	78.6° (2014)	21° (1975)
25	61.3°	34°	17%	79.9° (2017)	3° (1975)
26	59.2°	34.3°	17%	75.7° (1977)	-1.1° (2020)
27	57.6°	32.9°	23%	80.2° (2016)	0.1° (2020)
28	58.6°	32°	18%	79.2° (2024)	6.6° (2011)
29	57°	31.6°	27%	78.1° (2018)	5° (2019)
30	54°	30.4°	27%	75.6° (1968)	-5.3° (1993)
31	53.2°	30.2°	23%	75.6° (2016)	4.3° (2019)