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Shaded-relief atlas plate of Mercer, Pennsylvania: rivers, roads, the city limits and where the water drains.
PENNSYLVANIA · BUTLER COUNTY

Mercer

998 people, in Butler County.

998People, 2024 estimate
13 sq miLand area
Sunny 71°
Sunny now Dew point 54° · W 5 mph · high 73°
City of Mercer River Interstate 2 miles
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The Mercer plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Mercer

NWS forecast and National Blend of Models · updated 2:00 PM EDT
RIGHT NOW Youngstown-Warren Regional Airport (KYNG) · 2:51 PM
Sunny
71° Sunny Feels like 71° · high of 73° near 3 PM
WindW 5 mphno gusts
Humidity55%rising to 100% by morning
Pressure30.07 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 54° · Dry63° by Friday: more humid
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Tomorrow, about 9 PMin about 30 hours · 31% chance · rain
LIKELY AMOUNT0–0.03 inmost likely 0; 1 in 10 over 0.1
LAST RAINSept. 230.04 in · 6 dry days
ALERTS & OUTLOOKS
No watches or warnings for Butler County
NWS Pittsburgh and the Storm Prediction Center · checked 3:21 PM
SUN & MOON
↑ 7:14 AM7:06 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
35
GOODAir quality index · ozone
Tomorrow: 56, moderate. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
clear day
mostly clear night
mostly clear night
mostly clear night
partly cloudy night
partly cloudy day
partly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy night
rain
rain
mostly cloudy night
mostly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
rain
rain
rain
rain
TEMPERATURE °F
73°
54°
74°
63°
75°
65°
CHANCE OF RAIN
72% · 0.18 in Friday morning 50%
WIND, MPH
5
0
0
3
5
6
7
8
7
7
7
7
8
9
9
10
10
8
8
8
9
9
11
12
HOW IT FEELS · DEW POINT
Comfortable: dew points 53 to 63° More humid: 63° by Friday

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 69° / 48°
TUE Sept. 29 Mostly sunny Mostly sunny
73° 52°
0% rain — WSW 3 A
WED Sept. 30 Chance of showers Chance of showers
76° 62°
30% rain — SSW 7 A
THU Oct. 1 Chance of showers Chance of showers
78° 63°
30% rain up to 0.05″ SSW 9 C
FRI Oct. 2 Showers likely Showers likely
71° 49°
90% rain 0.2–0.8″ NNW 10 C
SAT Oct. 3 Partly cloudy Partly cloudy
66° 47°
10% rain — NNE 8 B
SUN Oct. 4 Partly cloudy Partly cloudy
67° 46°
20% rain — WNW 7 B
MON Oct. 5 Mostly sunny Mostly sunny
61° 39°
0% rain — NNW 7 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

MILE7
ON THE NETWORK

Around Mercer on the Forecast Network

Neighboring plates

Cranberry PA · 29 MI 29 miles south Youngstown OH · 33 MI 33 miles west Pittsburgh PA · 47 MI 47 miles south Cleveland OH · 90 MI 90 miles west Buffalo NY · 136 MI 136 miles northeast Detroit MI · 182 MI 182 miles northwest
FORECASTCITY
Atlas plate of Mercer, Pennsylvania. Explore the plate
PENNSYLVANIA · BUTLER

Mercer

998 people, in Butler County.

998People
13 sq miLand
Sunny 71°
SunnyDew point 54°
1

Today in Mercer

NEXT 15 HOURS
Now clear day 73° 0%
6p mostly sunny 70° 0%
9p mostly clear night 60° 0%
12a mostly clear night 56° 0%
3a partly cloudy night 54° 0%
6a mostly clear night 54° 0%
Rain
NEXT RAINTomorrow about 9 PM · 31%
→
Tue0%
Mostly sunny Mostly sunny
52
73
A
Wed30%
Chance of showers Chance of showers
62
76
A
Thu30%
Chance of showers Chance of showers
63
78
C
Fri90%
Showers likely Showers likely
49
71
C
Sat10%
Partly cloudy Partly cloudy
47
66
B
Sun20%
Partly cloudy Partly cloudy
46
67
B
Mon0%
Mostly sunny Mostly sunny
39
61
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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