Islip picked up 36.91 inches of rain in 2025. Measurable rain, 0.01 inch or more in a day, fell on 119 days at Islip Long Island MacArthur Airport; the wettest day brought 2.93 inches on Jul 31, 2025. The 1991-2020 normal for a full year is 45.99 inches. The total landed 9.08 inches below the normal, which works out to 20% less. 2025 ranks 55th out of 62 complete years, wettest first, in a record that starts in 1963.
Monthly rain totals for 2025. Dark bars show measured amounts, light bars show the 1991-2020 normal for comparison.
Every day with measurable rain in 2025
Every day with measurable rain in 2025: Islip
Date
Rainfall
0.22″ inches
0.04″ inches
0.13″ inches
0.70″ inches
0.20″ inches
0.68″ inches
0.39″ inches
0.03″ inches
0.05″ inches
1.33″ inches
0.58″ inches
0.04″ inches
0.65″ inches
0.23″ inches
0.05″ inches
0.06″ inches
0.20″ inches
0.14″ inches
0.72″ inches
0.03″ inches
0.02″ inches
0.04″ inches
2.60″ inches
0.23″ inches
0.12″ inches
0.75″ inches
1.07″ inches
0.25″ inches
0.01″ inches
0.03″ inches
0.23″ inches
0.07″ inches
0.14″ inches
0.01″ inches
0.41″ inches
0.39″ inches
0.29″ inches
0.06″ inches
0.32″ inches
0.11″ inches
0.01″ inches
0.03″ inches
2.93″ inches
0.07″ inches
0.04″ inches
0.03″ inches
0.64″ inches
0.20″ inches
0.01″ inches
0.27″ inches
0.04″ inches
0.10″ inches
0.05″ inches
1.26″ inches
0.05″ inches
0.19″ inches
0.06″ inches
0.12″ inches
0.22″ inches
0.02″ inches
0.57″ inches
0.32″ inches
0.01″ inches
0.01″ inches
0.31″ inches
0.41″ inches
0.19″ inches
0.18″ inches
0.04″ inches
1.46″ inches
0.12″ inches
0.01″ inches
0.10″ inches
0.33″ inches
0.12″ inches
0.44″ inches
0.36″ inches
0.72″ inches
0.05″ inches
0.14″ inches
0.55″ inches
0.03″ inches
0.01″ inches
0.12″ inches
0.14″ inches
0.14″ inches
0.18″ inches
0.13″ inches
0.10″ inches
0.11″ inches
0.30″ inches
0.17″ inches
0.44″ inches
0.01″ inches
0.01″ inches
1.18″ inches
0.13″ inches
0.09″ inches
1.15″ inches
0.40″ inches
0.01″ inches
0.01″ inches
1.33″ inches
0.07″ inches
1.41″ inches
0.39″ inches
0.25″ inches
0.14″ inches
0.16″ inches
0.17″ inches
0.52″ inches
0.37″ inches
0.03″ inches
0.13″ inches
0.08″ inches
0.23″ inches
0.14″ inches
0.20″ inches
0.03″ inches
Daily totals come from Islip Long Island MacArthur Airport, which appears in GHCN-Daily with records going back to 1963. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.