Chatham, PA Weather Forecast | 5 Day
Updated: Fri Sep 18th 2026 4:00 PM EDT
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Sunny
Fri 9-18-26
Sunny with a high of 76°F and a low of 67°F. There might be light rainfall having a 21% chance with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 25.9mph at 9 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 69% at 7 PM and 59% being its lowest at 9 PM. Barometric pressure is its highest of 30.1inHg at 9 PM, a lowest point of 30.04inHg at 6 PM with an avg 30.07inHg.
- HI: 76°F
- LO: 67°F
- Rainfall: 21% | est. 0in
- Snowfall: 0%
- Wind
10.3 mph - Humidity
77% avg. - UV Index
7.2 - Air QualityGood
- Sunrise
06:47 AM - Sunset
07:07 PM - Moonrise
02:56 PM - Moonset
11:44 PM - Moon Phase
First Quarter
Sunny
Weather Tomorrow, Sat 9-19-26
Sunny with a high of 74°F and a low of 59°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 25.5mph at 12 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 85% at 11 PM and 42% being its lowest at 2 PM. Barometric pressure is its highest of 30.17inHg at 10 AM, a lowest point of 30.09inHg at 5 PM with an avg 30.13inHg.
- HI: 74°F
- LO: 59°F
- Rainfall: 6%
- Snowfall: 0%
- Wind
9.2 mph - Humidity
61% avg. - UV Index
7.1 - Air QualityGood
- Sunrise
06:48 AM - Sunset
07:05 PM - Moonrise
03:42 PM - Moonset
Does not set today - Moon Phase
First Quarter
Scattered Showers
Sun 9-20-26
Scattered Showers with a high of 73°F and a low of 62°F. Rainfall expected to have a 64% chance with an estimated 0.03in. Wind will be moderate, blowing around 11mph on average and gusts of 20.8mph at 4 PM. High humidity with average of 85% is anticipated, the maximum being 95% at 10 PM and 70% being its lowest at 12 PM. Barometric pressure is its highest of 30.13inHg at 12 AM, a lowest point of 29.91inHg at 6 PM with an avg 30.01inHg.
- HI: 73°F
- LO: 62°F
- Rainfall: 64% | est. 0.03in
- Snowfall: 0%
- Wind
10.7 mph - Humidity
85% avg. - UV Index
4.3 - Air QualityGood
- Sunrise
06:49 AM - Sunset
07:04 PM - Moonrise
04:20 PM - Moonset
12:43 AM - Moon Phase
Waxing Gibbous
Scattered Showers
Mon 9-21-26
Scattered Showers with a high of 68°F and a low of 57°F. It will likey rain, having a 90% chance of a downpour with an estimated 0.38in. Wind will be moderate, blowing around 11mph on average and gusts of 24mph at 11 PM. High humidity with average of 88% is anticipated, the maximum being 96% at 8 PM and 68% being its lowest at 2 PM. Barometric pressure is its highest of 30.15inHg at 10 PM, a lowest point of 29.95inHg at 1 AM with an avg 30.06inHg.
- HI: 68°F
- LO: 57°F
- Rainfall: 90% | est. 0.38in
- Snowfall: 0%
- Wind
10.1 mph - Humidity
88% avg. - UV Index
4.8 - Air QualityGood
- Sunrise
06:50 AM - Sunset
07:02 PM - Moonrise
04:51 PM - Moonset
01:45 AM - Moon Phase
Waxing Gibbous
Light Rain Shower
Tue 9-22-26
Light Rain Shower with a high of 58°F and a low of 55°F. It will likey rain, having a 94% chance of a downpour with an estimated 1.07in. Wind will be moderate, blowing around 16mph on average and gusts of 32.9mph at 8 PM. High humidity with average of 96% is anticipated, the maximum being 97% at 2 AM and 95% being its lowest at 4 PM. Barometric pressure is its highest of 30.27inHg at 9 PM, a lowest point of 30.14inHg at 12 AM with an avg 30.2inHg.
- HI: 58°F
- LO: 55°F
- Rainfall: 94% | est. 1.07in
- Snowfall: 0%
- Wind
15.7 mph - Humidity
96% avg. - UV Index
3 - Air QualityGood
- Sunrise
06:50 AM - Sunset
07:00 PM - Moonrise
05:17 PM - Moonset
02:47 AM - Moon Phase
Waxing Gibbous
Scattered Showers
Wed 9-23-26
Scattered Showers with a high of 61°F and a low of 55°F. Rainfall expected to have a 74% chance with an estimated 0.04in. Wind will be moderate, blowing around 17mph on average and gusts of 39.6mph at 11 AM. High humidity with average of 90% is anticipated, the maximum being 96% at 2 AM and 83% being its lowest at 11 PM. Barometric pressure is its highest of 30.29inHg at 11 AM, a lowest point of 30.22inHg at 11 PM with an avg 30.25inHg.
- HI: 61°F
- LO: 55°F
- Rainfall: 74% | est. 0.04in
- Snowfall: 0%
- Wind
16.6 mph - Humidity
90% avg. - UV Index
4 - Air QualityTBA
- Sunrise
06:51 AM - Sunset
06:59 PM - Moonrise
05:41 PM - Moonset
03:49 AM - Moon Phase
Waxing Gibbous
This 5-Day weather forecast is valid for ZIP code 19318, accurately covering the area of Chatham, PA.
Currently
 |
74°F |
30.05 inHg.
Barometer 63%
Humidity NNW 11.9 mph Wind |
| Overcast | ||
National Outlook
Heavy Rain in North-Central U.S. & Scorching Heat in South-Central U.S. - 09-18 to 09-20
Fri Sep 18th 2026, 5:45am PDT
Read
Wet Weather with Possible Flood Concerns in the Southern Regions 09-21 to 09-25
Extended Forecast
Fri Sep 18th 2026, 5:56am PDT
Read
Fri Sep 18th 2026, 5:56am PDT
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