Jamestown, NY

New York · Records since 1895–2026

☀️ 70°F
Currently in Jamestown
As of 2:30 PM EDT

Records for September 11

🔥 Record High

92°F

September 11, 1952

+17° from 75° normal

❄ Record Low

34°F

September 11, 1935

-17° from 51° normal
🌞 Normal high: 75°F 🌑 Normal low: 51°F 1991–2020 normals

All-Time Records — Jamestown

🔥
103°F
Hottest Day Ever
Jun 21, 1988
❄
-31°F
Coldest Day Ever
Feb 17, 2015
🌧
4.52"
Wettest Day Ever
Oct 16, 1954
☃
23.0"
Most Snow in One Day
Mar 17, 1936

First & Last Dates — Jamestown

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)
199 days
Longest growing season
1955
104 days
Shortest growing season
1929
149 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 92°F September 11, 1952
2 92°F September 11, 1931
3 92°F September 11, 1925
4 91°F September 11, 1908
5 90°F September 11, 2013
6 89°F September 11, 2002
7 86°F September 11, 2016
8 86°F September 11, 1936
9 86°F September 11, 1906
10 86°F September 11, 1896

Top 5 Record Lows — September 11

# Temp Date
🥶 34°F September 11, 1935
2 36°F September 11, 1926
3 36°F September 11, 1923
4 36°F September 11, 1898
5 37°F September 11, 1995
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 1895–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Jamestown

threshold: 88°F (90th percentile of historical Jun–Aug highs)
4.2
Avg heat wave length
days (historical)
93°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1897–2026
6
2026 so far
8
Avg/year 1970–2025
6
Avg/year (last 10 complete)
29
Most in a year (1988)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Jamestown

# Dates Days Peak Avg High Avg Overnight Low
🏆 Aug 26, 1953 – Sep 4, 1953 10 98°F (Sep 2) 93°F 63°F
2 Jul 18, 1934 – Jul 27, 1934 10 97°F (Jul 24) 92°F 61°F
3 Jul 7, 1936 – Jul 15, 1936 9 100°F (Jul 9) 96°F 65°F
4 Jul 23, 1941 – Jul 31, 1941 9 97°F (Jul 27) 93°F 67°F
5 Jun 18, 1923 – Jun 26, 1923 9 94°F (Jun 24) 91°F 63°F
6 Aug 9, 1944 – Aug 17, 1944 9 93°F (Aug 10) 92°F 66°F
7 May 31, 1934 – Jun 7, 1934 8 98°F (Jun 2) 93°F 63°F
8 Jul 18, 2011 – Jul 25, 2011 8 98°F (Jul 23) 92°F 66°F
9 Jul 30, 1955 – Aug 6, 1955 8 95°F (Jul 31) 92°F 68°F
10 Jun 2, 1925 – Jun 9, 1925 8 93°F (Jun 2) 91°F 66°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

40
2026 total
above-normal nights
32.3
Avg / summer
1970–2020
69
Most in a summer
1943

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 (1895–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1895, annual totals have trended +0.52" per decade, about +6.8" 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 Jamestown is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

117 of 244 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

32.94"
2026 YTD
Normal: 31.39"
+1.55"
1.42"
September so far
September normal: 4.19"
-2.77"
5
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Jamestown is 1.55" ahead of the normal pace

Period Review — Jun 1 – Aug 31, 2026

Any window, evaluated against every other year on record — 92 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
67.3°F
Average temperature
42nd-coolest of 99
+0.4°
vs. average
Normal: 66.9°F (1991–2020)
9.87"
Precipitation
22nd-driest of 78
-2.44"
vs. average
Normal: 12.31" · 80% of normal

Average Temperature by Year — Jun 1 – Aug 31

1896–2026 · 2026 highlighted · trend -0.11° per decade (cooling since 1896)

Precipitation by Year — Jun 1 – Aug 31

1896–2026 · 2026 highlighted · trend +0.07" per decade (wetter since 1896)

Warmest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 1949 71.7°F
2 1934 71.5°F
3 1955 71.4°F
4 1959 71.0°F
5 1931 71.0°F
6 1944 71.0°F
7 1943 70.8°F
8 1952 70.8°F
9 1933 70.5°F
10 1906 70.4°F

Coolest Jun 1 – Aug 31 on Record

# Year Avg Temp
1 1992 62.1°F
2 1982 62.3°F
3 1977 63.3°F
4 1974 63.3°F
5 1979 63.6°F
6 1978 64.1°F
7 1976 64.1°F
8 2009 64.3°F
9 1981 64.6°F
10 2004 64.7°F

Wettest Jun 1 – Aug 31 on Record

# Year Total
1 2021 20.49"
2 1975 20.29"
3 1977 19.78"
4 2009 19.52"
5 1928 17.96"
6 1902 17.06"
7 2014 16.76"
8 1956 16.53"
9 1982 15.50"
10 1938 15.37"

Driest Jun 1 – Aug 31 on Record

# Year Total
1 1923 5.50"
2 1954 6.10"
3 1934 6.13"
4 1953 6.65"
5 1930 6.85"
6 1906 7.66"
7 1952 7.83"
8 1995 7.93"
9 1960 8.04"
10 1962 8.55"
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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