Groton weather in April: Groton, Connecticut: normal highs, lows, rain and records for April
Groton in April has a normal high of 56°F and a normal low of 39°F, a daily mean of 48°F, rising from 51°F on the 1st to 61°F by the 30th. Measurable precipitation falls on 11 days in a normal April, 3.58 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 13°C and low of 4°C, 91 mm of precipitation in April.
- NOAA stationGroton New London Airport
- Station IDUSW00014707
- Location41.33°N 72.05°W
- Elevation10 ft (3 m)
- Population10,160
- Jan 38° 23°
- Feb 40° 25°
- Mar 47° 31°
- Apr 56° 39°
- May 65° 49°
- Jun 74° 58°
- Jul 80° 65°
- Aug 79° 64°
- Sep 74° 57°
- Oct 63° 46°
- Nov 53° 37°
- 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 Groton in April?
The normal high is 56°F and the normal low 39°F, for a daily mean of 47.6°F. April is 9.0°F warmer than March and 9.2°F cooler than May. April is the 7th warmest month of the year in Groton and the 4th wettest. Across the month the normal high rises 10°F, from 51°F on April 1 to 61°F on April 30. From one year to the next April's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Aprils in three average between 46°F and 50°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 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| April 1 | 51°F | 35°F | 33% | 20% |
| April 8 | 54°F | 37°F | 34% | 20% |
| April 15 | 56°F | 39°F | 35% | 20% |
| April 22 | 59°F | 41°F | 35% | 20% |
| April 30 | 61°F | 44°F | 36% | 20% |
Every day of April: normal high, low and chance of precipitation (warmest afternoon April 30, coldest night April 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| April 1 | 51°F | 35°F | 33% | 20% | 12 h 40 min |
| April 2 | 52°F | 35°F | 33% | 20% | 12 h 40 min |
| April 3 | 52°F | 35°F | 33% | 20% | 12 h 40 min |
| April 4 | 52°F | 36°F | 33% | 20% | 12 h 50 min |
| April 5 | 53°F | 36°F | 34% | 20% | 12 h 50 min |
| April 6 | 53°F | 36°F | 34% | 20% | 12 h 50 min |
| April 7 | 53°F | 36°F | 34% | 20% | 13 h |
| April 8 | 54°F | 37°F | 34% | 20% | 13 h |
| April 9 | 54°F | 37°F | 34% | 20% | 13 h |
| April 10 | 54°F | 37°F | 34% | 20% | 13 h |
| April 11 | 55°F | 38°F | 34% | 20% | 13 h 10 min |
| April 12 | 55°F | 38°F | 34% | 20% | 13 h 10 min |
| April 13 | 55°F | 38°F | 34% | 20% | 13 h 10 min |
| April 14 | 56°F | 39°F | 35% | 20% | 13 h 10 min |
| April 15 | 56°F | 39°F | 35% | 20% | 13 h 20 min |
| April 16 | 57°F | 39°F | 35% | 20% | 13 h 20 min |
| April 17 | 57°F | 40°F | 35% | 20% | 13 h 20 min |
| April 18 | 57°F | 40°F | 35% | 20% | 13 h 20 min |
| April 19 | 58°F | 40°F | 35% | 20% | 13 h 30 min |
| April 20 | 58°F | 41°F | 35% | 20% | 13 h 30 min |
| April 21 | 58°F | 41°F | 35% | 20% | 13 h 30 min |
| April 22 | 59°F | 41°F | 35% | 20% | 13 h 30 min |
| April 23 | 59°F | 42°F | 36% | 20% | 13 h 40 min |
| April 24 | 59°F | 42°F | 36% | 20% | 13 h 40 min |
| April 25 | 59°F | 42°F | 36% | 20% | 13 h 40 min |
| April 26 | 60°F | 43°F | 36% | 20% | 13 h 40 min |
| April 27 | 60°F | 43°F | 36% | 20% | 13 h 50 min |
| April 28 | 60°F | 43°F | 36% | 20% | 13 h 50 min |
| April 29 | 61°F | 44°F | 36% | 20% | 13 h 50 min |
| April 30 | 61°F | 44°F | 36% | 20% | 13 h 50 min |
- Normal high
- 56°FApril average
- Normal low
- 39°FApril average
- Precipitation
- 3.58 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 5
- Daylight
- 12 h 40 min to 13 h 50 minApril 1 to April 30
- Days at 70°F or more
- 2
- Sunshine
- 71%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014707; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Groton in April?
On a given April day the chance of 0.01 inch or more is 35% on average, highest around April 30 (36%). In all, 3.58 in falls on 11 days of a normal April, 1 of them with an inch or more.
In a normal April in Groton, 5 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014707.
What are the records for April in Groton?
The warmest April temperature on this station's record (since 1999) is 86°F, on April 26, 2009; the coldest is 22°F, on April 2, 2019. The wettest April brought 6.94 in (2004).
The April mean against the 1991-2020 normal of 47.6°F: 2021 47.9°F (+0.3), 2022 48.9°F (+1.3), 2023 52.0°F (+4.4), 2024 48.4°F (+0.8), 2025 49.5°F (+1.9), 2026 47.7°F (+0.1). 6 of 6 ran warmer than normal.
| April | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 47.9°F | +0.3°F | 2.91 in |
| 2022 | 48.9°F | +1.3°F | 2.41 in |
| 2023 | 52.0°F | +4.4°F | 4.25 in |
| 2024 | 48.4°F | +0.8°F | 3.39 in |
| 2025 | 49.5°F | +1.9°F | 2.75 in |
| 2026 | 47.7°F | +0.1°F | 1.80 in |
Source: records: ACIS, station USW00014707; recent months: ACIS, station USW00014707. Records and recent months use complete months only.
How does April in Groton compare across Connecticut?
Across the 13 places PlainClimate covers in Connecticut, April normal highs run from 54°F in Norfolk to 62°F in Stamford; Groton's is 56°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.