Suffolk County Weather in July
Average highs run from 83°F on July 1 to 84°F on July 31, and lows from 65°F to 67°F. Normal precipitation for the month is 3.05 in over about 8 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 84°F
- Average low
- 67°F
- Precipitation
- 3.05 in
- Record high
- 100°FJul 5, 1999
- Record low
- 42°FJul 3, 2001
- Chance of a freeze
- 0%
- Days of 90°F or more
- 4.8
- Daylight
- 15 h 04 min to 14 h 22 min
- Cloud cover
- 57%
- Humidity
- 80%
- Dew point
- 66°F
- Wind
- 8.5 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 |
|---|---|---|---|---|---|---|
| Jul 1 | 83°F | 65°F | 96°F 1963 | 50°F 2000 | 26% | 0% |
| Jul 2 | 83°F | 65°F | 96°F 1966 | 46°F 1965 | 26% | 0% |
| Jul 3 | 83°F | 66°F | 98°F 1966 | 42°F 2001 | 26% | 0% |
| Jul 4 | 83°F | 66°F | 97°F 2010 | 51°F 2004 | 26% | 0% |
| Jul 5 | 83°F | 66°F | 100°F 1999 | 48°F 2009 | 26% | 0% |
| Jul 6 | 83°F | 66°F | 100°F 2010 | 46°F 1962 | 26% | 0% |
| Jul 7 | 84°F | 66°F | 95°F 2012 | 46°F 2001 | 26% | 0% |
| Jul 8 | 84°F | 67°F | 90°F 2024 | 43°F 2000 | 26% | 0% |
| Jul 9 | 84°F | 67°F | 87°F 2011 | 49°F 1969 | 26% | 0% |
| Jul 10 | 84°F | 67°F | 92°F 2000 | 46°F 2009 | 26% | 0% |
| Jul 11 | 84°F | 67°F | 91°F 1966 | 42°F 2009 | 26% | 0% |
| Jul 12 | 84°F | 67°F | 93°F 2011 | 44°F 2002 | 26% | 0% |
| Jul 13 | 84°F | 67°F | 93°F 1952 | 45°F 2001 | 26% | 0% |
| Jul 14 | 84°F | 67°F | 93°F 2019 | 47°F 1999 | 26% | 0% |
| Jul 15 | 84°F | 67°F | 95°F 2013 | 47°F 2009 | 26% | 0% |
| Jul 16 | 84°F | 67°F | 95°F 2013 | 51°F 2001 | 26% | 0% |
| Jul 17 | 84°F | 67°F | 93°F 2006 | 51°F 2015 | 27% | 0% |
| Jul 18 | 84°F | 67°F | 97°F 2013 | 56°F 2014 | 27% | 0% |
| Jul 19 | 84°F | 67°F | 91°F 1963 | 52°F 2009 | 27% | 0% |
| Jul 20 | 84°F | 67°F | 95°F 2019 | 52°F 2003 | 27% | 0% |
| Jul 21 | 84°F | 67°F | 97°F 2019 | 48°F 1966 | 27% | 0% |
| Jul 22 | 84°F | 67°F | 98°F 2011 | 51°F 2012 | 28% | 0% |
| Jul 23 | 84°F | 67°F | 97°F 2016 | 50°F 2000 | 28% | 0% |
| Jul 24 | 84°F | 67°F | 92°F 2010 | 50°F 2026 | 28% | 0% |
| Jul 25 | 84°F | 67°F | 90°F 2010 | 48°F 2002 | 28% | 0% |
| Jul 26 | 84°F | 67°F | 94°F 2005 | 48°F 2026 | 28% | 0% |
| Jul 27 | 84°F | 67°F | 95°F 1963 | 50°F 2001 | 28% | 0% |
| Jul 28 | 84°F | 67°F | 93°F 2020 | 47°F 2001 | 28% | 0% |
| Jul 29 | 84°F | 67°F | 96°F 2002 | 50°F 1968 | 28% | 0% |
| Jul 30 | 84°F | 67°F | 94°F 2002 | 47°F 1968 | 28% | 0% |
| Jul 31 | 84°F | 67°F | 92°F 2002 | 47°F 2001 | 28% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- July 1
- sunrise 5:23 AM, sunset 8:27 PM
- July 31
- sunrise 5:46 AM, sunset 8:08 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.