Georgetown, DE

Delaware · Records since 1945–2026

⛅ 80°F Feels like 83°
Currently in Georgetown
As of 2:30 PM EDT

Records for September 11

🔥 Record High

93°F

September 11, 2013

+12° from 81° normal

❄ Record Low

41°F

September 11, 1949

-22° from 63° normal
🌞 Normal high: 81°F 🌑 Normal low: 63°F 1991–2020 normals

All-Time Records — Georgetown

🔥
104°F
Hottest Day Ever
Jul 23, 2011
❄
-13°F
Coldest Day Ever
Jan 28, 1987
🌧
7.59"
Wettest Day Ever
Jun 25, 2006
☃
14.0"
Most Snow in One Day
Jan 30, 1966

First & Last Dates — Georgetown

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)
230 days
Longest growing season
2010
126 days
Shortest growing season
1956
205 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 93°F September 11, 2013
2 92°F September 11, 1989
3 92°F September 11, 1964
4 91°F September 11, 1996
5 91°F September 11, 1985
6 91°F September 11, 1961
7 90°F September 11, 2019
8 90°F September 11, 1983
9 90°F September 11, 1947
10 89°F September 11, 2007

Top 5 Record Lows — September 11

# Temp Date
🥶 41°F September 11, 1949
2 43°F September 11, 1953
3 44°F September 11, 1972
4 44°F September 11, 1969
5 44°F September 11, 1956
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 1945–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Georgetown

threshold: 93°F (90th percentile of historical Jun–Aug highs)
4.2
Avg heat wave length
days (historical)
97°
Avg peak temp
during heat waves
44
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Days ≥ 90°F Per Year

1945–2026
34
2026 so far
29
Avg/year 1970–2025
37
Avg/year (last 10 complete)
57
Most in a year (2010)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Georgetown

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 13, 1952 – Jul 24, 1952 12 101°F (Jul 23) 96°F 69°F
2 Jun 28, 2012 – Jul 8, 2012 11 103°F (Jul 7) 98°F 73°F
3 Jul 7, 1993 – Jul 15, 1993 9 101°F (Jul 12) 96°F 73°F
4 Aug 6, 1977 – Aug 14, 1977 9 98°F (Aug 8) 96°F 72°F
5 Jul 28, 2002 – Aug 5, 2002 9 97°F (Jul 29) 95°F 73°F
6 Aug 12, 2002 – Aug 19, 2002 8 100°F (Aug 13) 96°F 74°F
7 Aug 28, 1953 – Sep 3, 1953 7 100°F (Aug 31) 97°F 70°F
8 Jul 16, 2019 – Jul 22, 2019 7 100°F (Jul 17) 98°F 76°F
9 Jul 25, 1949 – Jul 31, 1949 7 99°F (Jul 28) 96°F 71°F
10 Jul 17, 1980 – Jul 23, 1980 7 98°F (Jul 17) 96°F 72°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

46
2026 total
above-normal nights
33.0
Avg / summer
1970–2020
63
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 (1945–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1945, annual totals have trended +0.39" per decade, about +3.1" 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 Georgetown is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

26.25"
2026 YTD
Normal: 30.16"
-3.91"
1.37"
September so far
September normal: 4.54"
-3.17"
10
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Georgetown is 3.91" 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)
76.6°F
Average temperature
10th-warmest of 80
+3.3°
vs. average
Normal: 73.2°F (1991–2020)
1.37"
Precipitation
27th-wettest of 79
-0.12"
vs. average
Normal: 1.49" · 92% of normal

Average Temperature by Year — Sep 1 – Sep 10

1945–2026 · 2026 highlighted · trend +0.31° per decade (warming since 1945)

Precipitation by Year — Sep 1 – Sep 10

1945–2026 · 2026 highlighted · trend +0.10" per decade (wetter since 1945)

Warmest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1961 78.9°F
2 2018 78.3°F
3 1993 77.9°F
4 2015 77.8°F
5 2023 77.7°F
6 1985 77.5°F
7 1959 77.3°F
8 2014 77.1°F
9 2020 76.7°F
10 2026 76.6°F

Coolest Sep 1 – Sep 10 on Record

# Year Avg Temp
1 1988 65.3°F
2 1994 65.6°F
3 1972 65.7°F
4 1986 65.9°F
5 1967 66.5°F
6 1949 66.9°F
7 1976 67.1°F
8 1982 67.1°F
9 1952 67.7°F
10 2024 67.8°F

Wettest Sep 1 – Sep 10 on Record

# Year Total
1 2002 6.23"
2 2006 5.32"
3 1977 5.23"
4 2018 3.90"
5 1998 3.51"
6 1974 2.89"
7 1957 2.73"
8 1972 2.59"
9 2008 2.52"
10 1979 2.37"

Driest Sep 1 – Sep 10 on Record

# Year Total
1 2024 0.00"
2 2013 0.00"
3 2005 0.00"
4 1995 0.00"
5 1994 0.00"
6 1989 0.00"
7 1971 0.00"
8 1967 0.00"
9 1964 0.00"
10 1963 0.00"
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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