Mercer, IL Weather Forecast | 10 Days
Updated: Sun Nov 1st 2026 6:30 AM CST
Sun, 11-1
63°F
57°F
57°F
Mon, 11-2
66°F
56°F
56°F
Tue, 11-3
71°F
61°F
61°F
Wed, 11-4
61°F
51°F
51°F
Thu, 11-5
55°F
47°F
47°F
Fri, 11-6
54°F
49°F
49°F
Sat, 11-7
54°F
47°F
47°F
Sun, 11-8
55°F
43°F
43°F
Mon, 11-9
53°F
39°F
39°F
Tue, 11-10
52°F
43°F
43°F
Overcast
Mercer IL Weather Forecast for Sun 11-1
Overcast with a high of 63°F and a low of 57°F. There might be light rainfall having a 25% chance. Wind will be moderate, blowing around 13mph on average and gusts of 27.7mph at 2 PM. The humidity will be on the higher side, averaging about 72%, the maximum being 85% at 10 PM and 62% being its lowest at 7 AM. Barometric pressure is its highest of 30.28 at 8 AM, a lowest point of 30.15 at 11 PM with an avg 30.21.
- HI: 63°F
- LO: 57°F
- Rain: 25%
- Snow: 0%
- Wind
13 mph - Humidity
72% avg. - UV Index
1.7 - Air QualityGood
- Sunrise
06:34 AM - Sunset
04:58 PM - Moonrise
10:51 PM - Moonset
01:01 PM - Moon Phase
Last Quarter - Hourly
Overcast
Mercer IL Weather Forecast for Mon 11-2
Overcast with a high of 66°F and a low of 56°F. It will likey rain, having a 76% chance of a downpour with an estimated 0.07in. Winds will be strong at speeds peaking at 21mph and gusts of 38.7mph at 11 PM. High humidity with average of 85% is anticipated, the maximum being 91% at 9 PM and 76% being its lowest at 4 PM. Barometric pressure is its highest of 30.14 at 12 AM, a lowest point of 29.82 at 11 PM with an avg 29.97.
- HI: 66°F
- LO: 56°F
- Rain: 76% | est. 0.07in
- Snow: 0%
- Wind
20.8 mph - Humidity
85% avg. - UV Index
2.2 - Air QualityGood
- Sunrise
06:35 AM - Sunset
04:57 PM - Moonrise
Does not rise today - Moonset
01:34 PM - Moon Phase
Last Quarter - Hourly
Isolated Showers
Mercer IL Weather Forecast for Tue 11-3
Isolated Showers with a high of 71°F and a low of 61°F. It will likey rain, having a 92% chance of a downpour with an estimated 0.49in. Winds will be strong at speeds peaking at 21mph and gusts of 41.2mph at 2 AM. High humidity with average of 89% is anticipated, the maximum being 97% at 9 PM and 73% being its lowest at 11 AM. Barometric pressure is its highest of 29.82 at 12 AM, a lowest point of 29.69 at 9 PM with an avg 29.76.
- HI: 71°F
- LO: 61°F
- Rain: 92% | est. 0.49in
- Snow: 0%
- Wind
20.1 mph - Humidity
89% avg. - UV Index
2.3 - Air QualityGood
- Sunrise
06:36 AM - Sunset
04:56 PM - Moonrise
12:07 AM - Moonset
02:01 PM - Moon Phase
Waning Crescent - Hourly
Isolated Showers
Mercer IL Weather Forecast for Wed 11-4
Isolated Showers with a high of 61°F and a low of 51°F. It will likey rain, having a 79% chance of a downpour with an estimated 0.08in. Wind will be moderate, blowing around 12mph on average and gusts of 18.9mph at 12 AM. High humidity with average of 87% is anticipated, the maximum being 97% at 2 AM and 70% being its lowest at 12 PM. Barometric pressure is its highest of 29.71 at 1 AM, a lowest point of 29.64 at 3 PM with an avg 29.67.
- HI: 61°F
- LO: 51°F
- Rain: 79% | est. 0.08in
- Snow: 0%
- Wind
11.9 mph - Humidity
87% avg. - UV Index
2.8 - Air QualityGood
- Sunrise
06:37 AM - Sunset
04:55 PM - Moonrise
01:21 AM - Moonset
02:26 PM - Moon Phase
Waning Crescent - Hourly
Isolated Showers
Mercer IL Weather Forecast for Thu 11-5
Isolated Showers with a high of 55°F and a low of 47°F. It will likey rain, having a 76% chance of a downpour with an estimated 0.07in. Wind will be moderate, blowing around 13mph on average and gusts of 22.4mph at 5 PM. High humidity with average of 87% is anticipated, the maximum being 94% at 4 AM and 77% being its lowest at 3 PM. Barometric pressure is its highest of 29.74 at 11 PM, a lowest point of 29.65 at 2 PM with an avg 29.69.
- HI: 55°F
- LO: 47°F
- Rain: 76% | est. 0.07in
- Snow: 0%
- Wind
12.5 mph - Humidity
87% avg. - UV Index
3 - Air QualityGood
- Sunrise
06:39 AM - Sunset
04:54 PM - Moonrise
02:34 AM - Moonset
02:49 PM - Moon Phase
Waning Crescent - Hourly
Overcast
Mercer IL Weather Forecast for Fri 11-6
Overcast with a high of 54°F and a low of 49°F. Rainfall expected to have a 65% chance with an estimated 0.05in. Wind will be moderate, blowing around 12mph on average and gusts of 21.3mph at 3 AM. The humidity will be on the higher side, averaging about 78%, the maximum being 93% at 12 AM and 68% being its lowest at 1 PM. Barometric pressure is its highest of 29.93 at 9 PM, a lowest point of 29.75 at 12 AM with an avg 29.86.
- HI: 54°F
- LO: 49°F
- Rain: 65% | est. 0.05in
- Snow: 0%
- Wind
11.2 mph - Humidity
78% avg. - UV Index
3 - Air QualityTBA
- Sunrise
06:40 AM - Sunset
04:52 PM - Moonrise
03:47 AM - Moonset
03:13 PM - Moon Phase
Waning Crescent - Hourly
Overcast
Mercer IL Weather Forecast for Sat 11-7
Overcast with a high of 54°F and a low of 47°F. There might be light rainfall having a 22% chance. Winds will be light at 5mph and gusts of 13.2mph at 12 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 85% at 6 AM and 57% being its lowest at 12 PM. Barometric pressure is its highest of 29.99 at 11 PM, a lowest point of 29.92 at 2 PM with an avg 29.94.
- HI: 54°F
- LO: 47°F
- Rain: 22%
- Snow: 0%
- Wind
4.7 mph - Humidity
73% avg. - UV Index
3 - Air QualityTBA
- Sunrise
06:41 AM - Sunset
04:51 PM - Moonrise
05:00 AM - Moonset
03:39 PM - Moon Phase
New Moon - Hourly
Sunny
Mercer IL Weather Forecast for Sun 11-8
Sunny with a high of 55°F and a low of 43°F. There's a very small chance of rainfall, only about 10%. Winds will be light at 6mph and gusts of 17.3mph at 9 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 89% at 6 AM and 53% being its lowest at 12 PM. Barometric pressure is its highest of 30.07 at 10 AM, a lowest point of 30 at 12 AM with an avg 30.05.
- HI: 55°F
- LO: 43°F
- Rain: 10%
- Snow: 0%
- Wind
6 mph - Humidity
73% avg. - UV Index
4 - Air QualityTBA
- Sunrise
06:42 AM - Sunset
04:50 PM - Moonrise
06:13 AM - Moonset
04:09 PM - Moon Phase
New Moon - Hourly
Sunny
Mercer IL Weather Forecast for Mon 11-9
Sunny with a high of 53°F and a low of 39°F. There's a very small chance of rainfall, only about 8%. Winds will be light at 7mph and gusts of 17.3mph at 12 AM. The humidity will be on the higher side, averaging about 70%, the maximum being 89% at 6 AM and 52% being its lowest at 12 PM. Barometric pressure is its highest of 30.15 at 10 AM, a lowest point of 30.08 at 12 AM with an avg 30.13.
- HI: 53°F
- LO: 39°F
- Rain: 8%
- Snow: 0%
- Wind
6.3 mph - Humidity
70% avg. - UV Index
4 - Air QualityTBA
- Sunrise
06:43 AM - Sunset
04:49 PM - Moonrise
07:26 AM - Moonset
04:45 PM - Moon Phase
New Moon - Hourly
Partly Cloudy
Mercer IL Weather Forecast for Tue 11-10
Partly Cloudy with a high of 52°F and a low of 43°F. There might be light rainfall having a 14% chance. Winds will be light at 9mph and gusts of 19.3mph at 3 PM. The humidity will be on the higher side, averaging about 71%, the maximum being 84% at 12 AM and 61% being its lowest at 3 PM. Barometric pressure is its highest of 30.13 at 12 AM, a lowest point of 30.09 at 3 PM with an avg 30.12.
- HI: 52°F
- LO: 43°F
- Rain: 14%
- Snow: 0%
- Wind
8.5 mph - Humidity
71% avg. - UV Index
4 - Air QualityTBA
- Sunrise
06:45 AM - Sunset
04:48 PM - Moonrise
08:36 AM - Moonset
05:28 PM - Moon Phase
New Moon - Hourly
Currently
 |
57°F |
30.27 inHg.
Barometer 72%
Humidity ESE 13.3 mph Wind |
| Overcast | ||
National Outlook
Heavy Rain and Flash Flooding in the Southwest from 10-31 to 11-02
Sat Oct 31st 2026, 5:27am PDT
Read
Storm System to Bring Heavy Rain to Central and East USA 11-03-2026 to 11-07-2026
Extended Forecast
Sat Oct 31st 2026, 5:40am PDT
Read
Sat Oct 31st 2026, 5:40am PDT
Weather Forecast Nearby
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