O Fallon Hourly Forecast
Next 48 Hours
Tonight
Cloudy. Lows in the mid 30s. Northwest winds 5 to 10 mph.
Saturday
Mostly cloudy in the morning, then clearing. Highs in the lower 50s. Southwest winds around 5 mph.
| Fri, Nov 22nd | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
7 PM Cloudy  UV Index: 0 |
42°F Feels 35°F |
86% | 8.9 NW | 30.13 inHg | 37.7°F | 0% |
8 PM Cloudy UV Index: 0 |
41°F Feels 34°F |
87% | 8.5 NW | 30.13 inHg | 36.8°F | 0% |
9 PM Partly Cloudy  UV Index: 0 |
40°F Feels 34°F |
89% | 7.4 NW | 30.15 inHg | 36.5°F | 0% |
10 PM Cloudy UV Index: 0 |
40°F Feels 34°F |
87% | 6.9 NW | 30.15 inHg | 36.2°F | 0% |
11 PM Overcast  UV Index: 0 |
39°F Feels 33°F |
88% | 7.4 NW | 30.16 inHg | 36.3°F | 0% |
Saturday Night
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 30s. South winds 5 to 10 mph.
Sunday
Mostly sunny. Not as cool with highs in the mid 60s. South winds 10 to 15 mph with gusts up to 25 mph.
| Sat, Nov 23rd | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM Overcast UV Index: 0 |
39°F Feels 33°F |
89% | 5.8 WNW | 30.14 inHg | 35.7°F | 0% |
1 AM Overcast UV Index: 0 |
39°F Feels 33°F |
90% | 6.3 WNW | 30.13 inHg | 35.7°F | 0% |
2 AM Overcast UV Index: 0 |
39°F Feels 33°F |
90% | 6.5 WNW | 30.13 inHg | 35.7°F | 0% |
3 AM Overcast UV Index: 0 |
39°F Feels 34°F |
89% | 5.6 WNW | 30.13 inHg | 35.6°F | 0% |
4 AM Overcast UV Index: 0 |
39°F Feels 34°F |
89% | 5.1 WNW | 30.14 inHg | 35.6°F | 0% |
5 AM Overcast UV Index: 0 |
39°F Feels 35°F |
89% | 5.1 WNW | 30.13 inHg | 35.6°F | 0% |
6 AM Overcast UV Index: 0 |
39°F Feels 35°F |
87% | 4.7 WNW | 30.14 inHg | 35.3°F | 0% |
7 AM Overcast  UV Index: 0 |
39°F Feels 35°F |
86% | 4.9 WNW | 30.15 inHg | 35°F | 0% |
8 AM Overcast UV Index: 0.2 |
39°F Feels 35°F |
85% | 4.7 WNW | 30.17 inHg | 34.7°F | 0% |
9 AM Overcast UV Index: 0.7 |
39°F Feels 36°F |
82% | 3.4 W | 30.19 inHg | 34.1°F | 0% |
10 AM Overcast UV Index: 1.3 |
40°F Feels 37°F |
80% | 3.8 W | 30.19 inHg | 33.9°F | 0% |
11 AM Overcast UV Index: 1.9 |
41°F Feels 37°F |
78% | 4 WSW | 30.18 inHg | 33.9°F | 0% |
12 PM Overcast UV Index: 2.4 |
42°F Feels 38°F |
76% | 5.4 SW | 30.16 inHg | 34.4°F | 0% |
1 PM Overcast UV Index: 1.9 |
43°F Feels 39°F |
73% | 6 SW | 30.13 inHg | 34.5°F | 0% |
2 PM Cloudy  UV Index: 1.4 |
44°F Feels 40°F |
71% | 5.8 WSW | 30.11 inHg | 35°F | 0% |
3 PM Partly Cloudy  UV Index: 0.7 |
45°F Feels 41°F |
70% | 6.3 SW | 30.1 inHg | 35.7°F | 0% |
4 PM Sunny UV Index: 0.2 |
47°F Feels 43°F |
71% | 6 SW | 30.09 inHg | 37.2°F | 0% |
5 PM Clear  UV Index: 0 |
46°F Feels 43°F |
75% | 3.4 SW | 30.08 inHg | 40.9°F | 0% |
6 PM Clear UV Index: 0 |
44°F Feels 41°F |
85% | 3.6 S | 30.08 inHg | 40.6°F | 0% |
7 PM Clear UV Index: 0 |
42°F Feels 38°F |
89% | 4.5 S | 30.08 inHg | 39.7°F | 0% |
8 PM Clear UV Index: 0 |
40°F Feels 35°F |
92% | 6 S | 30.07 inHg | 37.4°F | 0% |
9 PM Clear UV Index: 0 |
38°F Feels 33°F |
93% | 5.8 S | 30.06 inHg | 36.2°F | 0% |
10 PM Mist UV Index: 0 |
41°F Feels 36°F |
94% | 6.9 S | 30.05 inHg | 35°F | 0% |
11 PM Overcast UV Index: 0 |
38°F Feels 33°F |
66% | 6.9 SSW | 30.01 inHg | 33°F | 0% |
Sunday Night
Mostly cloudy with a 20 percent chance of rain. Not as cool. Near steady temperature in the mid 50s. Southwest winds 10 to 15 mph with gusts up to 25 mph.
Monday
Mostly cloudy with a chance of rain in the morning, then partly sunny with a slight chance of rain in the afternoon. Highs in the upper 50s. Temperature falling to around 50 in the afternoon. Chance of rain 30 percent.
| Sun, Nov 24th | Temp | Humidity | Wind (mph) | Pressure | Dew Point | Precip. |
|---|---|---|---|---|---|---|
12 AM MistUV Index: 0 |
37°F Feels 31°F |
96% | 6.5 SSW | 30.02 inHg | 34.4°F | 0% |
1 AM MistUV Index: 0 |
36°F Feels 30°F |
97% | 6.7 SSW | 30.01 inHg | 34.2°F | 0% |
2 AM MistUV Index: 0 |
35°F Feels 29°F |
97% | 6.5 SSW | 30.01 inHg | 34°F | 0% |
3 AM MistUV Index: 0 |
35°F Feels 29°F |
98% | 6.5 S | 30 inHg | 33.9°F | 0% |
4 AM Fog UV Index: 0 |
35°F Feels 28°F |
98% | 6.9 S | 30 inHg | 33.8°F | 0% |
5 AM FogUV Index: 0 |
35°F Feels 28°F |
98% | 7.4 S | 29.99 inHg | 34.2°F | 0% |
6 AM FogUV Index: 0 |
35°F Feels 28°F |
97% | 7.8 S | 29.98 inHg | 34.4°F | 0% |
7 AM Partly Cloudy UV Index: 0 |
37°F Feels 31°F |
97% | 8.7 SSE | 29.98 inHg | 34.5°F | 0% |
8 AM Partly Cloudy UV Index: 0.2 |
40°F Feels 33°F |
90% | 9.2 S | 29.97 inHg | 36.7°F | 0% |
9 AM Partly Cloudy UV Index: 0.7 |
42°F Feels 35°F |
86% | 10.3 S | 29.96 inHg | 37.8°F | 0% |
10 AM Partly Cloudy UV Index: 1.4 |
46°F Feels 41°F |
82% | 12.3 S | 29.96 inHg | 38.9°F | 0% |
11 AM Partly Cloudy UV Index: 2 |
50°F Feels 45°F |
75% | 14.8 S | 29.91 inHg | 42.8°F | 0% |
12 PM Partly Cloudy UV Index: 2.3 |
54°F Feels 50°F |
71% | 15.9 SSW | 29.89 inHg | 44.8°F | 0% |
1 PM SunnyUV Index: 2.1 |
57°F Feels 54°F |
68% | 17.2 S | 29.86 inHg | 46.7°F | 0% |
2 PM SunnyUV Index: 1.4 |
59°F Feels 57°F |
70% | 17.7 S | 29.83 inHg | 50°F | 0% |
3 PM SunnyUV Index: 0.7 |
61°F Feels 60°F |
71% | 16.1 S | 29.81 inHg | 51.6°F | 0% |
4 PM SunnyUV Index: 0.2 |
60°F Feels 59°F |
72% | 15.7 S | 29.8 inHg | 53.3°F | 0% |
5 PM Cloudy UV Index: 0 |
59°F Feels 57°F |
78% | 15.2 S | 29.81 inHg | 52.6°F | 0% |
6 PM Cloudy UV Index: 0 |
58°F Feels 55°F |
82% | 14.3 S | 29.82 inHg | 52.3°F | 0% |
Currently
 |
44°F |
30.11in
Barometer 74%
Humidity Northwest 12.7mph Wind |
| Overcast | ||
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