New Haven weather in October: New Haven, Connecticut: normal highs, lows, rain and records for October
New Haven in October has a normal high of 64°F and a normal low of 46°F, a daily mean of 55°F, falling from 69°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 11 days in a normal October, 3.78 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 18°C and low of 8°C, 96 mm of precipitation in October.
- NOAA stationNew Haven Tweed Airport
- Station IDUSW00014758
- Location41.26°N 72.89°W
- Elevation3 ft (1 m)
- From the center4 miles
- Population137,562
- Jan 38° 23°
- Feb 40° 24°
- Mar 47° 30°
- Apr 58° 39°
- May 68° 49°
- Jun 76° 59°
- Jul 82° 66°
- Aug 81° 65°
- Sep 75° 57°
- Oct 64° 46°
- Nov 53° 36°
- Dec 44° 29°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is New Haven in October?
The normal high is 64°F and the normal low 46°F, for a daily mean of 54.7°F. October is 11.3°F cooler than September and 10.0°F warmer than November. October is the 6th warmest month of the year in New Haven and the 3rd wettest. Across the month the normal high falls 10°F, from 69°F on October 1 to 59°F on October 31. From one year to the next October's mean temperature typically moves about 2.8°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 52°F and 58°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 69°F | 52°F | 35% | 19% |
| October 8 | 67°F | 49°F | 35% | 20% |
| October 15 | 64°F | 46°F | 35% | 20% |
| October 22 | 62°F | 43°F | 34% | 21% |
| October 31 | 59°F | 40°F | 32% | 21% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 69°F | 52°F | 35% | 19% | 11 h 50 min |
| October 2 | 69°F | 51°F | 35% | 19% | 11 h 50 min |
| October 3 | 69°F | 51°F | 35% | 19% | 11 h 40 min |
| October 4 | 68°F | 50°F | 35% | 19% | 11 h 40 min |
| October 5 | 68°F | 50°F | 35% | 19% | 11 h 40 min |
| October 6 | 67°F | 50°F | 35% | 19% | 11 h 40 min |
| October 7 | 67°F | 49°F | 35% | 20% | 11 h 30 min |
| October 8 | 67°F | 49°F | 35% | 20% | 11 h 30 min |
| October 9 | 66°F | 48°F | 35% | 20% | 11 h 30 min |
| October 10 | 66°F | 48°F | 35% | 20% | 11 h 20 min |
| October 11 | 66°F | 47°F | 35% | 20% | 11 h 20 min |
| October 12 | 65°F | 47°F | 35% | 20% | 11 h 20 min |
| October 13 | 65°F | 47°F | 35% | 20% | 11 h 20 min |
| October 14 | 64°F | 46°F | 35% | 20% | 11 h 10 min |
| October 15 | 64°F | 46°F | 35% | 20% | 11 h 10 min |
| October 16 | 64°F | 45°F | 35% | 21% | 11 h 10 min |
| October 17 | 63°F | 45°F | 35% | 21% | 11 h 10 min |
| October 18 | 63°F | 45°F | 35% | 21% | 11 h |
| October 19 | 63°F | 44°F | 35% | 21% | 11 h |
| October 20 | 62°F | 44°F | 35% | 21% | 11 h |
| October 21 | 62°F | 43°F | 34% | 21% | 10 h 50 min |
| October 22 | 62°F | 43°F | 34% | 21% | 10 h 50 min |
| October 23 | 61°F | 43°F | 34% | 21% | 10 h 50 min |
| October 24 | 61°F | 42°F | 34% | 21% | 10 h 50 min |
| October 25 | 61°F | 42°F | 34% | 21% | 10 h 40 min |
| October 26 | 60°F | 42°F | 33% | 21% | 10 h 40 min |
| October 27 | 60°F | 41°F | 33% | 21% | 10 h 40 min |
| October 28 | 60°F | 41°F | 33% | 21% | 10 h 40 min |
| October 29 | 59°F | 41°F | 33% | 21% | 10 h 30 min |
| October 30 | 59°F | 40°F | 33% | 21% | 10 h 30 min |
| October 31 | 59°F | 40°F | 32% | 21% | 10 h 30 min |
- Normal high
- 64°FOctober average
- Normal low
- 46°FOctober average
- Precipitation
- 3.78 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 2
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 8
- Days at 80°F or more
- 1
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014758; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in New Haven in October?
On a given October day the chance of 0.01 inch or more is 34% on average, highest around October 8 (35%). In all, 3.78 in falls on 11 days of a normal October, 1 of them with an inch or more.
In a normal October in New Haven, 2 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014758.
What are the records for October in New Haven?
The warmest October temperature on this station's record (since 1948) is 89°F, on October 2, 2019; the coldest is 23°F, on October 19, 2015. The wettest October brought 14.60 in (2005); the snowiest, 1.3 inches (1962).
The October mean against the 1991-2020 normal of 54.7°F: 2021 61.2°F (+6.5), 2022 56.2°F (+1.5), 2023 59.6°F (+4.9), 2024 58.4°F (+3.7), 2025 58.0°F (+3.3). 5 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.2°F | +6.5°F | 7.11 in |
| 2022 | 56.2°F | +1.5°F | 2.26 in |
| 2023 | 59.6°F | +4.9°F | 3.18 in |
| 2024 | 58.4°F | +3.7°F | 0.32 in |
| 2025 | 58.0°F | +3.3°F | 5.39 in |
Source: records: ACIS, station USW00014758; recent months: ACIS, station USW00014758. Records and recent months use complete months only.
How does October in New Haven compare across Connecticut?
Across the 13 places PlainClimate covers in Connecticut, October normal highs run from 57°F in Norfolk to 64°F in Bridgeport; New Haven's is 64°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- New Haven in September75°F by day, 57°F at night
- New Haven in November53°F by day, 36°F at night
- New Haven through the yearEvery month, frost dates, records and recent years
- Connecticut in OctoberThe statewide normal and the warmest and coolest places
- Bridgeport: Connecticut's warmest Octobernormal high 64°F