Manchester, NH

New Hampshire · Records since 1885–2026

☀️ 75°F Feels like 69°
Currently in Manchester
As of 2:30 PM EDT

Records for September 11

🔥 Record High

95°F

September 11, 2013

+19° from 76° normal

❄ Record Low

37°F

September 11, 1885

-19° from 56° normal
🌞 Normal high: 76°F 🌑 Normal low: 56°F 1991–2020 normals

All-Time Records — Manchester

🔥
103°F
Hottest Day Ever
Jul 22, 2011
❄
-29°F
Coldest Day Ever
Feb 16, 1943
🌧
7.08"
Wettest Day Ever
Jul 25, 1887
☃
17.3"
Most Snow in One Day
Jan 4, 1941

First & Last Dates — Manchester

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)
212 days
Longest growing season
2017
134 days
Shortest growing season
1947
182 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 95°F September 11, 2013
2 91°F September 11, 1931
3 86°F September 11, 2019
4 86°F September 11, 1952
5 83°F September 11, 1971
6 81°F September 11, 2022
7 81°F September 11, 2016
8 81°F September 11, 1947
9 80°F September 11, 2025
10 80°F September 11, 2024

Top 5 Record Lows — September 11

# Temp Date
🥶 37°F September 11, 1885
2 39°F September 11, 1967
3 40°F September 11, 1953
4 40°F September 11, 1930
5 41°F September 11, 1969
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 1885–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Manchester

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

1885–2026
15
2026 so far
13
Avg/year 1970–2025
24
Avg/year (last 10 complete)
36
Most in a year (1955)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Manchester

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 5, 2024 – Jul 18, 2024 14 97°F (Jul 15) 94°F 70°F
2 Aug 11, 2002 – Aug 19, 2002 9 98°F (Aug 14) 95°F 69°F
3 Aug 2, 2022 – Aug 9, 2022 8 99°F (Aug 4) 95°F 71°F
4 Jul 25, 2020 – Aug 1, 2020 8 96°F (Jul 27) 92°F 70°F
5 Jul 3, 2010 – Jul 9, 2010 7 99°F (Jul 5) 94°F 70°F
6 Jun 29, 2018 – Jul 5, 2018 7 95°F (Jul 1) 93°F 71°F
7 Jun 29, 1955 – Jul 5, 1955 7 94°F (Jul 2) 92°F 65°F
8 Aug 6, 1949 – Aug 11, 1949 6 100°F (Aug 10) 95°F 65°F
9 Aug 28, 1953 – Sep 2, 1953 6 100°F (Sep 2) 95°F 62°F
10 Jul 31, 1955 – Aug 5, 1955 6 100°F (Aug 1) 95°F 64°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

28
2026 total
above-normal nights
39.5
Avg / summer
1970–2020
66
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 (1885–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1885, annual totals have trended +0.99" per decade, about +13.9" 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 Manchester is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

21.74"
2026 YTD
Normal: 27.18"
-5.44"
0.83"
September so far
September normal: 3.72"
-2.89"
2
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Manchester is 5.44" 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)
69.9°F
Average temperature
18th-warmest of 66
-0.5°
vs. average
Normal: 70.4°F (1991–2020)
1.05"
Precipitation
3rd-driest of 68
-2.25"
vs. average
Normal: 3.30" · 32% of normal

Average Temperature by Year — Aug 11 – Sep 10

1885–2026 · 2026 highlighted · trend +0.51° per decade (warming since 1885)

Precipitation by Year — Aug 11 – Sep 10

1886–2026 · 2026 highlighted · trend -0.02" per decade (drier since 1886)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 2015 74.8°F
2 2016 74.4°F
3 2021 74.0°F
4 2018 72.6°F
5 2002 72.6°F
6 2020 72.3°F
7 2023 71.8°F
8 2022 71.7°F
9 2012 71.4°F
10 2010 71.3°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1946 62.3°F
2 1887 62.4°F
3 1934 62.5°F
4 1930 63.4°F
5 1941 63.4°F
6 1885 63.9°F
7 1888 64.2°F
8 1936 64.3°F
9 1893 64.5°F
10 1943 64.5°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 2011 8.26"
2 2017 7.28"
3 2004 6.64"
4 2021 6.63"
5 2008 6.21"
6 1888 6.18"
7 1955 6.16"
8 2018 5.56"
9 1935 5.27"
10 1937 5.01"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 2007 0.49"
2 1953 0.56"
3 2026 1.05"
4 2019 1.06"
5 1962 1.27"
6 2013 1.33"
7 1943 1.46"
8 1963 1.51"
9 2020 1.56"
10 1968 1.57"
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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