Bangor, ME

Maine · Records since 1925–2026

☀️ 70°F Feels like 62°
Currently in Bangor
As of 2:30 PM EDT

Records for September 11

🔥 Record High

93°F

September 11, 1931

+20° from 73° normal

❄ Record Low

36°F

September 11, 1995

-15° from 51° normal
🌞 Normal high: 73°F 🌑 Normal low: 51°F 1991–2020 normals

All-Time Records — Bangor

🔥
104°F
Hottest Day Ever
Aug 19, 1935
❄
-32°F
Coldest Day Ever
Feb 10, 1948
🌧
6.40"
Wettest Day Ever
Dec 14, 1927
☃
30.0"
Most Snow in One Day
Dec 14, 1927

First & Last Dates — Bangor

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)
188 days
Longest growing season
1989
102 days
Shortest growing season
1940
146 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 93°F September 11, 1931
2 91°F September 11, 1961
3 90°F September 11, 1983
4 87°F September 11, 1947
5 84°F September 11, 1982
6 83°F September 11, 2002
7 83°F September 11, 1934
8 82°F September 11, 2022
9 82°F September 11, 2013
10 81°F September 11, 1971

Top 5 Record Lows — September 11

# Temp Date
🥶 36°F September 11, 1995
2 37°F September 11, 2009
3 38°F September 11, 2008
4 38°F September 11, 2006
5 38°F September 11, 1944
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 1925–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Bangor

threshold: 88°F (90th percentile of historical Jun–Aug highs)
3.9
Avg heat wave length
days (historical)
94°
Avg peak temp
during heat waves
2
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1926–2026
4
2026 so far
7
Avg/year 1970–2025
6
Avg/year (last 10 complete)
36
Most in a year (1937)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Bangor

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 21, 1948 – Aug 30, 1948 10 103°F (Aug 22) 95°F 66°F
2 Aug 4, 1937 – Aug 13, 1937 10 97°F (Aug 7) 92°F 66°F
3 Jul 31, 1938 – Aug 9, 1938 10 97°F (Aug 6) 92°F 65°F
4 Aug 11, 2002 – Aug 19, 2002 9 95°F (Aug 13) 92°F 63°F
5 Jul 4, 1937 – Jul 11, 1937 8 97°F (Jul 8) 92°F 64°F
6 Aug 28, 1937 – Sep 4, 1937 8 96°F (Aug 31) 94°F 62°F
7 Aug 15, 1935 – Aug 21, 1935 7 104°F (Aug 19) 96°F 64°F
8 Aug 11, 1944 – Aug 17, 1944 7 100°F (Aug 12) 97°F 62°F
9 Aug 5, 1949 – Aug 11, 1949 7 95°F (Aug 9) 93°F 64°F
10 Aug 16, 1937 – Aug 21, 1937 6 97°F (Aug 18) 93°F 62°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

48
2026 total
above-normal nights
44.0
Avg / summer
1970–2020
64
Most in a summer
1973

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 (1925–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1925, annual totals have trended +0.86" per decade, about +8.6" 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 Bangor is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

18.57"
2026 YTD
Normal: 26.93"
-8.36"
0.91"
September so far
September normal: 3.76"
-2.85"
3
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Bangor is 8.36" behind the normal pace

Period Review — Aug 11 – Sep 10, 2026

Any window, evaluated against every other year on record — 31 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
66.5°F
Average temperature
33rd-warmest of 97
+0.4°
vs. average
Normal: 66.1°F (1991–2020)
1.21"
Precipitation
9th-driest of 91
-1.89"
vs. average
Normal: 3.10" · 39% of normal

Average Temperature by Year — Aug 11 – Sep 10

1926–2026 · 2026 highlighted

Precipitation by Year — Aug 11 – Sep 10

1928–2026 · 2026 highlighted · trend +0.06" per decade (wetter since 1928)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1948 75.3°F
2 1937 72.6°F
3 1932 71.5°F
4 2015 70.9°F
5 1933 70.5°F
6 1949 70.3°F
7 1931 69.3°F
8 1959 69.2°F
9 2002 69.1°F
10 2016 69.0°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1940 59.7°F
2 1977 60.5°F
3 1963 60.6°F
4 1941 61.0°F
5 1946 61.2°F
6 1962 61.7°F
7 1964 61.9°F
8 1954 62.3°F
9 1982 62.3°F
10 1997 62.3°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 1969 7.37"
2 2013 6.68"
3 2011 6.55"
4 1965 5.77"
5 1931 5.72"
6 2021 5.68"
7 1967 5.65"
8 2012 5.61"
9 1950 5.29"
10 2010 5.28"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 1937 0.37"
2 1960 0.76"
3 1971 0.81"
4 1948 0.91"
5 1980 0.96"
6 2002 1.12"
7 1976 1.16"
8 1996 1.19"
9 2026 1.21"
10 1957 1.24"
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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