As of 16:50 CDT

Weather in O'Fallon, MO

88°

O'Fallon, Wednesday, 7 October, 16:50

Clear. Feels like 89°. High 88°, low 55°.

Pressure29.85 inHg

Wind9.2 mph SW

Humidity43%

Visibility6.2 mi

Dew point63°

Wed, 07October

88°/55°

Thu, 08October

82°/51°

Fri, 09October

86°/54°

Sat, 10October

85°/61°

Sun, 11October

69°/61°

Mon, 12October

88°/58°

Tue, 13October

78°/67°

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	83°	60°	58°	55°	63°	71°	79°	83°	85°	87°	77°	63°
Feels like	83°	59°	57°	54°	62°	71°	79°	84°	85°	88°	77°	63°
Pressure, inHg	29.91	29.91	29.91	29.91	29.91	29.91	29.91	29.91	29.91	29.85	29.88	29.97
Wind, mph	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	3.9	2.3	3.6	3
Humidity, %	45%	45%	45%	45%	45%	45%	45%	45%	45%	44%	54%	74%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	—	—	—	—	—	—	—	—	—	6.2 mi	6.2 mi	6.2 mi

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	59°	59°	57°	54°	59°	72°	78°	81°	82°	73°	62°	58°
Feels like	58°	58°	56°	53°	59°	72°	77°	80°	80°	72°	60°	56°
Pressure, inHg	30.00	30.00	30.03	30.06	30.09	30.12	30.12	30.09	30.06	30.06	30.06	30.09
Wind, mph	2.2	1.6	0.5	1	1.4	0.5	1.6	1.3	1.4	1.4	2.1	2.3
Humidity, %	79%	85%	88%	93%	93%	66%	40%	29%	26%	41%	48%	55%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	56°	58°	57°	56°	61°	71°	80°	84°	86°	81°	75°	72°
Feels like	54°	56°	56°	54°	60°	69°	80°	83°	84°	81°	75°	71°
Pressure, inHg	30.09	30.09	30.09	30.12	30.12	30.15	30.12	30.06	30.03	30.00	30.06	30.09
Wind, mph	2.2	2.8	2.6	1.8	2.6	2.8	3.2	3.3	3.5	3.2	4.4	4.1
Humidity, %	59%	57%	58%	59%	58%	44%	34%	34%	33%	39%	43%	48%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	69°	65°	63°	61°	64°	74°	82°	85°	83°	78°	72°	69°
Feels like	68°	64°	62°	60°	63°	73°	82°	82°	81°	77°	71°	68°
Pressure, inHg	30.09	30.06	30.06	30.09	30.09	30.12	30.09	30.06	30.00	30.00	30.00	29.97
Wind, mph	3.7	2.4	2.1	2.1	2.8	2.5	3.4	4.5	4.4	3.1	2	1.7
Humidity, %	56%	64%	66%	65%	59%	50%	41%	29%	25%	28%	38%	47%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi	6.2 mi

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	67°	63°	61°	61°	61°	63°	64°	66°	69°	67°	67°	65°
Feels like	67°	63°	62°	61°	62°	63°	64°	66°	69°	67°	67°	65°
Pressure, inHg	30.00	29.94	29.91	29.91	29.91	29.91	29.91	29.91	29.88	29.91	29.91	29.91
Wind, mph	2.8	2.5	4.4	4.1	3.7	3.1	2.5	2.3	2.5	4.4	4.4	4.4
Humidity, %	61%	88%	93%	95%	93%	89%	84%	77%	69%	81%	81%	81%
Precipitation	0.01 in	0.05 in	0.05 in	0.02 in	0 in	0 in	0.01 in	0 in	0 in	0.01 in	0.01 in	0.01 in
Visibility	3.7 mi	1.6 mi	1.9 mi	4.5 mi	5.6 mi	5.2 mi	6.2 mi	6.2 mi	6.2 mi	—	—	—

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	84°	73°	65°	58°	65°	73°	80°	83°	82°	80°	79°	78°
Feels like	84°	73°	65°	58°	66°	73°	81°	84°	82°	80°	79°	78°
Pressure, inHg	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88
Wind, mph	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8	4.8
Humidity, %	49%	49%	49%	49%	49%	49%	49%	49%	49%	49%	49%	49%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	—	—	—	—	—	—	—	—	—	—	—	—

	00:00	02:00	04:00	06:00	08:00	10:00	12:00	14:00	16:00	18:00	20:00	22:00

Temperature	75°	68°	68°	67°	69°	72°	74°	75°	74°	73°	72°	70°
Feels like	75°	67°	67°	67°	69°	72°	74°	75°	74°	73°	71°	70°
Pressure, inHg	29.97	29.97	29.97	29.97	29.97	29.97	29.97	29.97	29.97	29.97	29.97	29.97
Wind, mph	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3	6.3
Humidity, %	71%	71%	71%	71%	71%	71%	71%	71%	71%	71%	71%	71%
Precipitation	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in	0 in
Visibility	—	—	—	—	—	—	—	—	—	—	—	—

See detailed hourly forecast

Sun and moon today

Day length — 11 h 32 min

Sunrise — 07:04

Sunset — 18:36

Sunrise and sunset in local time

Waning crescent, 13%

Sunrise — —

Sunset — —

O'Fallon, MO climate by month

The annual average temperature in O'Fallon, MO is 56.3°. The warmest month is July (average high 87.6°), and the coldest is January (average low 23.1°). About 40.4 inches of precipitation fall per year, most of it in May (4.6 in). Figures are 60-year climate normals and records from 66 years of observations.

Month	High	Low	Precipitation	Wet days	Record high	Record low
January	38.5°	23.1°	2.4 in	7	69.1° (2008)	-20.7° (1970)
February	43.4°	26.3°	2.3 in	7	79.3° (2024)	-15° (1981)
March	54.8°	36.5°	3.8 in	11	82.2° (2017)	-11.4° (1980)
April	65.6°	47°	4.4 in	11	88.9° (2006)	23.4° (2018)
May	74.4°	56.8°	4.6 in	13	95.7° (2012)	35.1° (1966)
June	83.6°	66.1°	3.8 in	11	105.6° (2012)	47.5° (1969)
July	87.6°	70.6°	3.4 in	10	104.5° (1966)	53.2° (1975)
August	85.7°	69°	3.1 in	9	103.6° (2007)	51.4° (1986)
September	78.5°	61.8°	3.0 in	8	99.1° (2013)	39.4° (1995)
October	67°	50.5°	3.3 in	8	91.9° (1963)	28.8° (1981)
November	53.7°	38.9°	3.4 in	8	81.5° (2023)	-0° (1991)
December	42.7°	28.6°	2.7 in	8	73.6° (2025)	-24.2° (1989)