Reading, PA

Pennsylvania · Records since 1888–2026

☀️ 78°F
Currently in Reading
As of 2:30 PM EDT

Records for September 11

🔥 Record High

100°F

September 11, 1983

+21° from 79° normal

❄ Record Low

40°F

September 11, 1995

-18° from 58° normal
🌞 Normal high: 79°F 🌑 Normal low: 58°F 1991–2020 normals

All-Time Records — Reading

🔥
106°F
Hottest Day Ever
Jul 22, 2011
❄
-14°F
Coldest Day Ever
Jan 21, 1994
🌧
6.75"
Wettest Day Ever
Oct 8, 2005
☃
24.6"
Most Snow in One Day
Jan 23, 2016

First & Last Dates — Reading

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
247 days
Longest growing season
1929
138 days
Shortest growing season
1974
189 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 100°F September 11, 1983
2 97°F September 11, 1931
3 95°F September 11, 1964
4 94°F September 11, 2013
5 92°F September 11, 1912
6 91°F September 11, 2019
7 91°F September 11, 1989
8 91°F September 11, 1925
9 90°F September 11, 1961
10 90°F September 11, 1906

Top 5 Record Lows — September 11

# Temp Date
🥶 40°F September 11, 1995
2 40°F September 11, 1917
3 43°F September 11, 1969
4 43°F September 11, 1924
5 44°F September 11, 1994
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1888–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Reading

threshold: 92°F (90th percentile of historical Jun–Aug highs)
4.2
Avg heat wave length
days (historical)
97°
Avg peak temp
during heat waves
17
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1888–2026
23
2026 so far
21
Avg/year 1970–2025
30
Avg/year (last 10 complete)
49
Most in a year (1983)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Reading

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 25, 1953 – Sep 4, 1953 11 102°F (Sep 2) 98°F 71°F
2 Jun 26, 1901 – Jul 6, 1901 11 101°F (Jul 1) 96°F 73°F
3 Jul 4, 1993 – Jul 13, 1993 10 97°F (Jul 8) 94°F 72°F
4 Jul 15, 1955 – Jul 23, 1955 9 99°F (Jul 22) 96°F 73°F
5 Jul 17, 2011 – Jul 24, 2011 8 106°F (Jul 22) 98°F 74°F
6 Jun 27, 1966 – Jul 4, 1966 8 103°F (Jul 3) 97°F 71°F
7 Jul 28, 2002 – Aug 4, 2002 8 101°F (Aug 2) 96°F 71°F
8 Aug 10, 1944 – Aug 17, 1944 8 100°F (Aug 13) 96°F 73°F
9 Jun 7, 1984 – Jun 14, 1984 8 96°F (Jun 10) 95°F 66°F
10 Aug 6, 1900 – Aug 12, 1900 7 99°F (Aug 11) 97°F 71°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

52
2026 total
above-normal nights
39.0
Avg / summer
1970–2020
68
Most in a summer
2020

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1858–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1858, annual totals have trended +0.80" per decade, about +13.3" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

This Year — 2026

How Reading is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

120 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

25.39"
2026 YTD
Normal: 31.63"
-6.24"
2.89"
September so far
September normal: 4.88"
-1.99"
6
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Reading is 6.24" behind the normal pace

Period Review — Sep 1 – Sep 10, 2026

Any window, evaluated against every other year on record — 10 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
72.9°F
Average temperature
39th-warmest of 131
+2.2°
vs. average
Normal: 70.7°F (1991–2020)
2.89"
Precipitation
15th-wettest of 152
+1.27"
vs. average
Normal: 1.62" · 178% of normal

Average Temperature by Year — Sep 1 – Sep 10

1888–2026 · 2026 highlighted

Precipitation by Year — Sep 1 – Sep 10

1869–2026 · 2026 highlighted · trend +0.08" per decade (wetter since 1869)

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1961 79.1°F
2 1929 77.7°F
3 2023 77.6°F
4 1959 77.6°F
5 1900 77.5°F
6 2015 77.3°F
7 1898 76.3°F
8 1921 76.2°F
9 1985 75.9°F
10 1953 75.7°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 2017 62.6°F
2 1988 62.8°F
3 1924 63.7°F
4 1888 63.9°F
5 1986 63.9°F
6 1994 64.0°F
7 1935 64.4°F
8 1917 64.5°F
9 1975 64.6°F
10 1976 64.7°F

Wettest Sep 1 – Sep 10 on Record

# Year Total
1 1987 8.52"
2 2011 8.40"
3 2021 6.40"
4 1952 5.05"
5 2018 4.92"
6 1999 4.28"
7 1894 3.86"
8 1968 3.51"
9 1993 3.40"
10 1877 3.34"

Driest Sep 1 – Sep 10 on Record

# Year Total
1 2010 0.00"
2 2005 0.00"
3 1989 0.00"
4 1971 0.00"
5 1964 0.00"
6 1955 0.00"
7 1889 0.00"
8 1886 0.00"
9 1884 0.00"
10 1874 0.00"
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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