As of 04:51 CDT

Weather in O'Fallon, MO

56°

O'Fallon, Thursday, 8 October, 04:51

Clear. Feels like 55°. High 85°, low 55°.

Pressure30.03 inHg

Wind1 mph N

Humidity89%

Visibility6.2 mi

Dew point53°

Thu, 08October

85°/55°

Fri, 09October

89°/57°

Sat, 10October

84°/62°

Sun, 11October

79°/62°

Mon, 12October

92°/62°

Tue, 13October

84°/65°

Wed, 14October

85°/59°

	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°	58°	56°	56°	57°	74°	83°	84°	85°	79°	64°	59°
Feels like	83°	56°	55°	55°	56°	73°	81°	81°	82°	78°	62°	57°
Pressure, inHg	30.09	30.09	30.09	30.03	30.06	30.09	30.09	30.06	30.03	30.00	30.03	30.06
Wind, mph	2.3	2.3	2.3	0.6	0.3	0.9	2.1	1.4	1.3	1.3	2	2.2
Humidity, %	29%	29%	29%	87%	84%	54%	29%	22%	21%	34%	43%	46%
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

	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	57°	59°	58°	58°	62°	76°	86°	88°	89°	83°	78°	74°
Feels like	55°	57°	57°	56°	60°	75°	84°	86°	87°	82°	77°	73°
Pressure, inHg	30.06	30.06	30.09	30.09	30.09	30.12	30.09	30.03	29.97	29.97	30.00	30.03
Wind, mph	2.7	3	2.2	2.1	3	2.5	2.7	3.4	3.6	3.1	3.7	4.2
Humidity, %	46%	47%	55%	57%	52%	39%	33%	32%	30%	35%	42%	45%
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	71°	67°	64°	63°	63°	71°	78°	83°	84°	79°	76°	72°
Feels like	70°	66°	63°	62°	62°	71°	78°	82°	82°	79°	75°	71°
Pressure, inHg	30.06	30.03	30.03	30.06	30.06	30.09	30.09	30.03	29.97	29.97	30.00	30.00
Wind, mph	3.4	2.4	2.1	2.3	1.5	1.9	2.2	2.3	3.3	1.7	3.9	3.5
Humidity, %	52%	58%	64%	66%	64%	51%	45%	37%	33%	41%	47%	43%
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°	65°	64°	63°	63°	66°	73°	77°	79°	74°	70°	66°
Feels like	67°	65°	64°	63°	63°	66°	73°	76°	79°	74°	70°	66°
Pressure, inHg	30.00	29.97	29.97	29.94	29.97	29.97	29.97	29.94	29.91	29.91	29.91	29.94
Wind, mph	0.9	1.7	1.6	1.7	1.9	1.6	1.9	2.2	2.3	1	0.9	0.7
Humidity, %	57%	71%	78%	86%	83%	65%	52%	46%	42%	53%	62%	71%
Precipitation	0 in	0.01 in	0 in	0.01 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	64°	62°	62°	62°	70°	78°	85°	88°	86°	84°	82°	81°
Feels like	64°	62°	61°	61°	69°	76°	84°	87°	85°	83°	81°	81°
Pressure, inHg	29.94	29.91	29.91	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88	29.88
Wind, mph	0.9	1.5	2.2	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Humidity, %	75%	78%	79%	31%	31%	31%	31%	31%	31%	31%	31%	31%
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	84°	67°	70°	74°	77°	80°	82°	82°	78°	75°	72°	69°
Feels like	84°	66°	70°	73°	76°	80°	83°	82°	78°	74°	71°	68°
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	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7	4.7
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	79°	72°	65°	59°	65°	71°	76°	79°	78°	78°	77°	76°
Feels like	79°	72°	65°	58°	64°	70°	76°	79°	78°	78°	77°	76°
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	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5	6.5
Humidity, %	41%	41%	41%	41%	41%	41%	41%	41%	41%	41%	41%	41%
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 30 min

Sunrise — 07:05

Sunset — 18:35

Sunrise and sunset in local time

Waning crescent, 10%

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)