Jamestown, NY

New York · Records since 1895–2026

☁️ 51°F Feels like 47°
Currently in Jamestown
As of 10:15 PM EDT

Records for September 26

🔥 Record High

89°F

September 26, 2017

+20° from 69° normal

❄ Record Low

29°F

September 26, 1943

-17° from 46° normal
🌞 Normal high: 69°F 🌑 Normal low: 46°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 26

# Temp Date
🏆 89°F September 26, 2017
2 88°F September 26, 1908
3 87°F September 26, 2007
4 85°F September 26, 1934
5 85°F September 26, 1933
6 85°F September 26, 1923
7 83°F September 26, 1930
8 82°F September 26, 1937
9 82°F September 26, 1900
10 81°F September 26, 2020

Top 5 Record Lows — September 26

# Temp Date
🥶 29°F September 26, 1943
2 30°F September 26, 1983
3 30°F September 26, 1976
4 30°F September 26, 1922
5 32°F September 26, 1978
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

122 of 257 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

33.95"
2026 YTD
Normal: 33.53"
+0.42"
2.43"
September so far
September normal: 4.19"
-1.76"
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 0.42" ahead of the normal pace

Period Review — Sep 18 – Sep 25, 2026

Any window, evaluated against every other year on record — 8 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
58.6°F
Average temperature
43rd-coolest of 97
+0.0°
vs. average
Normal: 58.6°F (1991–2020)

Average Temperature by Year — Sep 18 – Sep 25

1896–2026 · 2026 highlighted · trend -0.13° per decade (cooling since 1896)

Precipitation by Year — Sep 18 – Sep 25

1896–2025 · 2026 highlighted · trend -0.01" per decade (drier since 1896)

Warmest Sep 18 – Sep 25 on Record

# Year Avg Temp
1 1908 69.8°F
2 2017 69.6°F
3 1946 69.1°F
4 1931 68.6°F
5 1926 67.8°F
6 1906 67.6°F
7 2024 67.2°F
8 1923 66.5°F
9 1934 66.3°F
10 1940 65.4°F

Coolest Sep 18 – Sep 25 on Record

# Year Avg Temp
1 1981 47.8°F
2 1974 49.1°F
3 1962 51.0°F
4 1995 51.1°F
5 1896 51.4°F
6 1993 51.4°F
7 1990 51.7°F
8 1999 52.1°F
9 1897 52.3°F
10 1976 52.4°F
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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