Concord, NH

New Hampshire · Records since 1868–2026

☀️ 73°F Feels like 67°
Currently in Concord
As of 2:30 PM EDT

Records for September 11

🔥 Record High

95°F

September 11, 2013

+19° from 76° normal

❄ Record Low

31°F

September 11, 1967

-20° from 51° normal
🌞 Normal high: 76°F 🌑 Normal low: 51°F 1991–2020 normals

All-Time Records — Concord

🔥
102°F
Hottest Day Ever
Jul 3, 1966
❄
-37°F
Coldest Day Ever
Feb 16, 1943
🌧
5.98"
Wettest Day Ever
Oct 4, 1869
☃
25.6"
Most Snow in One Day
Dec 17, 2020

First & Last Dates — Concord

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)
179 days
Longest growing season
2021
85 days
Shortest growing season
1979
138 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 95°F September 11, 2013
2 95°F September 11, 1983
3 94°F September 11, 1931
4 91°F September 11, 1961
5 90°F September 11, 1964
6 88°F September 11, 1925
7 87°F September 11, 1947
8 87°F September 11, 1896
9 86°F September 11, 1952
10 86°F September 11, 1908

Top 5 Record Lows — September 11

# Temp Date
🥶 31°F September 11, 1967
2 31°F September 11, 1917
3 32°F September 11, 1995
4 33°F September 11, 1918
5 35°F September 11, 1975
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 1868–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Concord

threshold: 90°F (90th percentile of historical Jun–Aug highs)
3.9
Avg heat wave length
days (historical)
95°
Avg peak temp
during heat waves
6
Dangerous nights 2026
Overnights ≥ 70°F
3
Heat waves 2026
so far

Days ≥ 90°F Per Year

1869–2026
15
2026 so far
11
Avg/year 1970–2025
20
Avg/year (last 10 complete)
30
Most in a year (1955)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Concord

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 6, 2024 – Jul 17, 2024 12 94°F (Jul 8) 92°F 67°F
2 Aug 11, 2002 – Aug 19, 2002 9 99°F (Aug 14) 95°F 63°F
3 Aug 10, 1944 – Aug 17, 1944 8 99°F (Aug 12) 96°F 65°F
4 Aug 2, 2022 – Aug 9, 2022 8 98°F (Aug 4) 93°F 66°F
5 Jul 3, 1912 – Jul 10, 1912 8 97°F (Jul 8) 95°F 64°F
6 Jul 24, 1970 – Jul 31, 1970 8 94°F (Jul 27) 92°F 63°F
7 Jul 15, 1977 – Jul 21, 1977 7 101°F (Jul 20) 96°F 63°F
8 Jun 29, 2018 – Jul 5, 2018 7 96°F (Jul 1) 93°F 65°F
9 Jul 24, 1963 – Jul 29, 1963 6 99°F (Jul 26) 96°F 65°F
10 Jul 4, 2010 – Jul 9, 2010 6 99°F (Jul 6) 95°F 66°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

50
2026 total
above-normal nights
38.3
Avg / summer
1970–2020
72
Most in a summer
1877

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 (1868–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1868, annual totals have trended +0.21" per decade, about +3.3" 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 Concord is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

25.07"
2026 YTD
Normal: 27.85"
-2.78"
0.91"
September so far
September normal: 3.63"
-2.72"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Concord is 2.78" 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)
66.4°F
Average temperature
32nd-warmest of 159
+1.6°
vs. average
Normal: 64.7°F (1991–2020)
0.91"
Precipitation
61st-wettest of 159
-0.18"
vs. average
Normal: 1.09" · 83% of normal

Average Temperature by Year — Sep 1 – Sep 10

1868–2026 · 2026 highlighted · trend +0.07° per decade (warming since 1868)

Precipitation by Year — Sep 1 – Sep 10

1868–2026 · 2026 highlighted · trend +0.01" per decade (wetter since 1868)

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1961 73.1°F
2 2023 72.7°F
3 1999 72.0°F
4 1959 71.5°F
5 1875 71.4°F
6 2015 71.3°F
7 1884 70.1°F
8 2016 70.0°F
9 1898 69.9°F
10 1953 69.6°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1893 54.4°F
2 1994 55.7°F
3 1917 56.0°F
4 1885 56.4°F
5 1976 57.1°F
6 1896 57.3°F
7 1938 57.5°F
8 1967 57.7°F
9 1883 58.0°F
10 1984 58.0°F

Wettest Sep 1 – Sep 10 on Record

# Year Total
1 2008 5.56"
2 1868 4.50"
3 1969 4.01"
4 1935 3.76"
5 1924 3.69"
6 1888 3.30"
7 1999 3.25"
8 2021 3.15"
9 1905 3.06"
10 2017 2.94"

Driest Sep 1 – Sep 10 on Record

# Year Total
1 2009 0.00"
2 2005 0.00"
3 1983 0.00"
4 1978 0.00"
5 1961 0.00"
6 1955 0.00"
7 1884 0.00"
8 1874 0.00"
9 1872 0.00"
10 1948 0.01"
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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