Riverhead Weather in April
Average highs run from 54°F on April 1 to 66°F on April 30, and lows from 37°F to 46°F. Normal precipitation for the month is 4.08 in over about 11 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 60°F
- Average low
- 42°F
- Precipitation
- 4.08 in
- Snowfall
- 0.8 in
- Record high
- 88°FApr 17, 2002
- Record low
- 11°FApr 6, 2016
- Chance of a freeze
- 78%
- Daylight
- 12 h 42 min to 13 h 56 min
- Cloud cover
- 63%
- Humidity
- 82%
- Dew point
- 41°F
- Wind
- 11.0 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Apr 1 | 54°F | 37°F | 69°F 1955 | 14°F 1969 | 34% | 3% |
| Apr 2 | 54°F | 37°F | 72°F 1955 | 15°F 2019 | 34% | 3% |
| Apr 3 | 55°F | 37°F | 79°F 1967 | 15°F 2008 | 34% | 3% |
| Apr 4 | 55°F | 38°F | 74°F 2010 | 16°F 1954 | 34% | 3% |
| Apr 5 | 55°F | 38°F | 66°F 1968 | 15°F 2016 | 34% | 2% |
| Apr 6 | 56°F | 38°F | 69°F 2010 | 11°F 2016 | 34% | 2% |
| Apr 7 | 56°F | 39°F | 70°F 1999 | 16°F 2007 | 35% | 2% |
| Apr 8 | 57°F | 39°F | 67°F 2021 | 23°F 2004 | 35% | 2% |
| Apr 9 | 57°F | 39°F | 83°F 2013 | 19°F 2026 | 35% | 2% |
| Apr 10 | 58°F | 40°F | 69°F 1967 | 17°F 2007 | 35% | 2% |
| Apr 11 | 58°F | 40°F | 76°F 1955 | 17°F 2007 | 35% | 2% |
| Apr 12 | 58°F | 40°F | 81°F 2023 | 21°F 2020 | 35% | 1% |
| Apr 13 | 59°F | 41°F | 83°F 2023 | 19°F 2000 | 35% | 1% |
| Apr 14 | 59°F | 41°F | 85°F 2023 | 21°F 2000 | 35% | 1% |
| Apr 15 | 60°F | 41°F | 80°F 2024 | 22°F 1966 | 35% | 1% |
| Apr 16 | 60°F | 42°F | 80°F 2002 | 23°F 2008 | 35% | 1% |
| Apr 17 | 61°F | 42°F | 88°F 2002 | 20°F 2020 | 35% | 1% |
| Apr 18 | 61°F | 42°F | 87°F 2002 | 23°F 2022 | 35% | 1% |
| Apr 19 | 61°F | 43°F | 72°F 1958 | 20°F 2001 | 35% | 1% |
| Apr 20 | 62°F | 43°F | 82°F 1952 | 21°F 2026 | 35% | 1% |
| Apr 21 | 62°F | 43°F | 82°F 1957 | 23°F 2014 | 36% | 1% |
| Apr 22 | 63°F | 44°F | 79°F 1960 | 24°F 2024 | 36% | 1% |
| Apr 23 | 63°F | 44°F | 78°F 1952 | 20°F 2020 | 36% | 0% |
| Apr 24 | 63°F | 44°F | 77°F 2007 | 25°F 2018 | 36% | 0% |
| Apr 25 | 64°F | 45°F | 84°F 1960 | 23°F 2015 | 36% | 0% |
| Apr 26 | 64°F | 45°F | 87°F 2009 | 24°F 2024 | 36% | 0% |
| Apr 27 | 65°F | 45°F | 67°F 2003 | 25°F 2002 | 36% | 0% |
| Apr 28 | 65°F | 46°F | 75°F 2025 | 27°F 2012 | 36% | 0% |
| Apr 29 | 65°F | 46°F | 83°F 2017 | 27°F 2001 | 36% | 0% |
| Apr 30 | 66°F | 46°F | 79°F 2007 | 25°F 2022 | 36% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- April 1
- sunrise 6:34 AM, sunset 7:16 PM
- April 30
- sunrise 5:50 AM, sunset 7:46 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00307134 (Riverhead Rsch Farm), public domain. Records: NOAA GHCN-Daily, station USW00014719, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.