Caribou, ME

Maine · Records since 1939–2026

☀️ 71°F Feels like 67°
Currently in Caribou
As of 1:15 PM EDT

Records for September 7

🔥 Record High

91°F

September 7, 1945

+20° from 71° normal

❄ Record Low

33°F

September 7, 1962

-16° from 49° normal
🌞 Normal high: 71°F 🌑 Normal low: 49°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

Top 10 Record Highs — September 7

# Temp Date
🏆 91°F September 7, 1945
2 88°F September 7, 2015
3 84°F September 7, 2023
4 84°F September 7, 1959
5 84°F September 7, 1948
6 83°F September 7, 2007
7 83°F September 7, 1999
8 83°F September 7, 1960
9 83°F September 7, 1947
10 82°F September 7, 2016

Top 5 Record Lows — September 7

# Temp Date
🥶 33°F September 7, 1962
2 36°F September 7, 1952
3 37°F September 7, 1984
4 38°F September 7, 1988
5 38°F September 7, 1954
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

2026 Daily High Temperature vs Normal

Year to date
Above normal Below normal

111 of 249 days with data were above the 1991–2020 normal high for their date.

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

Actual vs. 1991–2020 full-month and full-season normals

29.04"
2026 YTD
Normal: 27.01"
+2.03"
0.74"
September so far
September normal: 3.44"
-2.70"
6
2026 heavy rain days
Days with ≥ 1.0"

2026 Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Caribou is 2.03" ahead of the normal pace

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")

Month in Review — August 2026

66.0°F

Average temperature · August 2026

51st-warmest month on record

13th-warmest August of 88 on record

+1.5° vs. 64.6° average (1991–2020)
71.5°F
Warmest month ever
July 2023
69.5°F
Warmest August ever
2021
91°F
Hottest of 2026
Jul 2

Average August Temperature by Year

1939–2026 · 2026 highlighted · trend +0.44° per decade (warming since 1939)

Precipitation — August 2026

Month total against the 1991–2020 average and every other August on record

3.74"
Total precipitation
August 2026
+0.14"
vs. average
Normal: 3.60" · 104% of normal
40th-wettest
August rank
of 87 on record
12.09"
Wettest August ever
1981 · driest 0.55" (2002)

August Precipitation by Year

1939–2026 · 2026 highlighted · trend -0.01" per decade (drier since 1939)

Wettest Augusts on Record

# Year Total
1 1981 12.09"
2 2011 9.58"
3 1958 8.45"
4 1977 7.86"
5 1991 6.72"
6 2023 6.60"
7 1959 6.52"
8 1963 6.35"
9 1954 6.30"
10 1992 6.28"

Driest Augusts on Record

# Year Total
1 2002 0.55"
2 1957 0.93"
3 1975 1.39"
4 2001 1.51"
5 1944 1.52"
6 1966 1.54"
7 2010 1.58"
8 2009 1.60"
9 1953 1.62"
10 1984 1.65"

Warmest Augusts on Record

# Year Avg Temp
1 2021 69.5°F
2 2018 68.9°F
3 2015 68.2°F
4 2012 68.0°F
5 1944 67.2°F
6 1990 66.6°F
7 2016 66.6°F
8 2024 66.5°F
9 1973 66.4°F
10 2020 66.4°F

Warmest Months on Record (Any Month)

# Month Avg Temp
1 July 2023 71.5°F
2 July 2018 70.9°F
3 July 2024 70.3°F
4 July 2020 69.9°F
5 July 1970 69.6°F
6 July 1952 69.5°F
7 August 2021 69.5°F
8 July 1959 69.4°F
9 July 2010 69.3°F
10 July 1995 69.1°F

Nearby Stations — August 2026

How the same month ranked at the closest reporting stations

Station Avg Temp August Rank
Caribou, ME 66.0°F 13th of 88
Millinocket, ME 68.8°F 12th of 120
Bangor, ME 70.3°F 12th of 96
Portland, ME 70.5°F 15th of 153
Burlington, VT 70.4°F 30th of 135
About this data. Monthly averages are the mean of daily average temperatures, computed from NOAA Threadex records via RCC ACIS. Months missing more than three days of observations are excluded from the rankings, so the in-progress month never appears. Rankings cover 1,048 complete months on record. Precipitation totals sum the daily reports for the month, with trace amounts counted as zero. A month missing any day of precipitation data is left out entirely (an unreported day is unreported rain), so the precipitation ranking covers 87 complete Augusts. Normals are the 1991–2020 mean for the same calendar month. Trend lines are a least-squares fit across every year shown.

Fall in Review — Fall 2026

September 1 – November 30, 2026

Fall 2026 is still under way. Season totals and rankings appear once November closes; the markers below update as they happen.

Summer to Winter — 2026

Each turning point of the season against its 1991–2020 normal date, with the earliest and latest on record

Marker 2026 Normal vs. normal Earliest Latest Drift
Last 90°F day
The final day of summer heat
 Jul 2
so far
 Jul 21 May 13, 2022 Sep 7, 1945 -1.4 d/decade
Last 80°F day
The last genuinely warm afternoon
 Aug 27
so far
 Sep 8 Aug 6, 1986 Oct 9, 2011 +0.9 d/decade
First high below 50°F
The first afternoon that stays cold
 not yet Oct 6 Sep 6, 1978 Nov 1, 2017 +1.6 d/decade
First 32°F freeze
Growing season over
 not yet Sep 25 Sep 3, 1976 Oct 25, 2021 +1.2 d/decade
First 28°F hard freeze
Cold enough to end tender growth
 not yet Oct 9 Sep 11, 1949 Nov 2, 1968 +1.6 d/decade
First 20°F night
Winter cold arriving
 not yet Nov 10 Oct 14, 1972 Dec 4, 2016 +1.5 d/decade
First measurable snow
0.1" or more in a day
 not yet Oct 29 Sep 29, 1991 Nov 23, 1994 +0.8 d/decade

Drift is a least-squares fit across every year on record. Positive means the marker has been arriving later.

First Freeze by Year

The first 32°F night of each autumn since 1939 · trending +1.2 days later per decade

133
Normal length
1991–2020 average
160
Longest on record
1998
92
Shortest on record
1950

Growing Season Length by Year

Days between the last spring freeze and the first fall freeze · trending +2.2 days longer per decade

Fall Average Temperature by Year

1939–2025 · 2026 highlighted · trend +0.41° per decade (warming since 1939)

Fall Precipitation by Year

1939–2025 · 2026 highlighted · trend +0.10" per decade (wetter since 1939)

About this data. Fall is meteorological autumn, September 1 through November 30, the window NOAA uses for seasonal statistics. Seasonal temperature is the day-weighted mean of the three monthly means; precipitation is their sum, and a season missing any of the three months is left out of the rankings. Freeze, heat and snow markers come from daily NOAA Threadex observations via RCC ACIS: freezes and snow are the first occurrence on or after July 1, and the last 90°F and 80°F days are the final ones anywhere in the calendar year. Growing season counts the freeze-free days between the last spring 32°F and the first fall 32°F.
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