Caribou, ME

Maine · Records since 1939–2026

🌤️ 60°F Feels like 51°
Currently in Caribou
As of 2:00 PM EDT

Records for September 11

🔥 Record High

84°F

September 11, 1961

+14° from 70° normal

❄ Record Low

28°F

September 11, 1949

-20° from 48° normal
🌞 Normal high: 70°F 🌑 Normal low: 48°F 1991–2020 normals

All-Time Records — Caribou

🔥
96°F
Hottest Day Ever
Jun 19, 2024
❄
-41°F
Coldest Day Ever
Feb 1, 1955
🌧
6.67"
Wettest Day Ever
Aug 17, 1981
☃
28.6"
Most Snow in One Day
Mar 14, 1984

First & Last Dates — Caribou

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)
160 days
Longest growing season
1998
92 days
Shortest growing season
1950
133 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 84°F September 11, 1961
2 84°F September 11, 1947
3 83°F September 11, 2022
4 83°F September 11, 2013
5 77°F September 11, 1983
6 75°F September 11, 2017
7 75°F September 11, 2009
8 75°F September 11, 2000
9 75°F September 11, 1945
10 74°F September 11, 1999

Top 5 Record Lows — September 11

# Temp Date
🥶 28°F September 11, 1949
2 32°F September 11, 2006
3 34°F September 11, 2008
4 35°F September 11, 1995
5 35°F September 11, 1953
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 1939–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Caribou

threshold: 84°F (90th percentile of historical Jun–Aug highs)
3.9
Avg heat wave length
days (historical)
90°
Avg peak temp
during heat waves
1
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1939–2026
2
2026 so far
3
Avg/year 1970–2025
4
Avg/year (last 10 complete)
11
Most in a year (1944)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Caribou

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jun 16, 2020 – Jun 24, 2020 9 96°F (Jun 19) 89°F 60°F
2 Jul 23, 1970 – Jul 31, 1970 9 91°F (Jul 25) 89°F 64°F
3 Aug 7, 2020 – Aug 14, 2020 8 92°F (Aug 11) 88°F 58°F
4 Jul 6, 1987 – Jul 13, 1987 8 91°F (Jul 10) 86°F 63°F
5 Aug 11, 2002 – Aug 18, 2002 8 91°F (Aug 15) 88°F 62°F
6 Aug 10, 1944 – Aug 16, 1944 7 95°F (Aug 14) 91°F 62°F
7 Aug 8, 2025 – Aug 13, 2025 6 94°F (Aug 11) 90°F 61°F
8 Jul 24, 1963 – Jul 29, 1963 6 93°F (Jul 25) 90°F 64°F
9 Jul 14, 1982 – Jul 19, 1982 6 93°F (Jul 18) 88°F 61°F
10 Aug 29, 2010 – Sep 3, 2010 6 93°F (Aug 31) 90°F 64°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

44
2026 total
above-normal nights
39.1
Avg / summer
1970–2020
61
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 (1939–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1939, annual totals have trended +0.84" per decade, about +7.2" 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 Caribou is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

29.38"
2026 YTD
Normal: 27.45"
+1.93"
1.08"
September so far
September normal: 3.44"
-2.36"
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 · Caribou is 1.93" ahead of 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)
61.7°F
Average temperature
38th-warmest of 88
-0.7°
vs. average
Normal: 62.4°F (1991–2020)
3.50"
Precipitation
41st-wettest of 87
-0.06"
vs. average
Normal: 3.56" · 98% of normal

Average Temperature by Year — Aug 11 – Sep 10

1939–2026 · 2026 highlighted · trend +0.40° per decade (warming since 1939)

Precipitation by Year — Aug 11 – Sep 10

1939–2026 · 2026 highlighted · trend -0.02" per decade (drier since 1939)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 2015 68.5°F
2 2021 66.8°F
3 1999 66.4°F
4 2016 65.9°F
5 2012 65.4°F
6 2002 65.3°F
7 2010 65.3°F
8 1948 65.1°F
9 2018 65.0°F
10 2023 64.7°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1941 56.0°F
2 1963 56.4°F
3 1986 56.5°F
4 1957 56.9°F
5 1954 57.2°F
6 1982 57.3°F
7 1956 57.6°F
8 1964 57.7°F
9 2006 57.9°F
10 1965 58.0°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 1981 9.42"
2 2011 8.21"
3 1958 7.44"
4 1979 7.24"
5 1972 6.98"
6 1963 6.54"
7 1993 6.50"
8 2004 6.37"
9 1969 6.01"
10 1959 5.98"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2009 1.05"
2 2003 1.17"
3 1968 1.21"
4 2018 1.51"
5 1984 1.54"
6 2007 1.58"
7 1957 1.70"
8 2002 1.77"
9 1962 1.80"
10 1975 1.82"
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.
← Back to all stations