Central Islip and Ronkonkoma have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Central Islip | Metric | Ronkonkoma |
|---|---|---|
| 205 days | Sunny daysclear or partly cloudy skies | 205 days |
| 47 in | Precipitationper year | 47 in |
| 121 days | Wet daysrain or snow per year | 121 days |
| 31 in | Snowfallper year | 32 in |
| 8 days | Hot daysabove 90 °F | 8 days |
| 90 days | Freezing nightsat or below 32 °F | 94 days |
| 74% | Humidityaverage relative | 73% |
| 53 °F | Average temperatureyear round | 53 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Islip high | 39 | 40 | 47 | 58 | 67 | 76 | 82 | 81 | 74 | 64 | 53 | 44 |
| Ronkonkoma high | 39 | 41 | 48 | 58 | 68 | 77 | 83 | 81 | 75 | 64 | 54 | 44 |
| Central Islip low | 25 | 26 | 32 | 42 | 51 | 61 | 68 | 67 | 60 | 48 | 38 | 30 |
| Ronkonkoma low | 25 | 26 | 32 | 41 | 51 | 61 | 67 | 66 | 59 | 47 | 38 | 30 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Islip | 3.8 | 3.5 | 4.6 | 3.8 | 3.5 | 3.6 | 3.3 | 3.9 | 3.8 | 4.4 | 3.7 | 4.8 |
| Ronkonkoma | 3.8 | 3.5 | 4.6 | 3.8 | 3.5 | 3.6 | 3.3 | 3.9 | 3.8 | 4.4 | 3.7 | 4.8 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Central Islip | 17 | 16 | 17 | 16 | 15 | 16 | 19 | 19 | 18 | 19 | 17 | 17 |
| Ronkonkoma | 17 | 16 | 17 | 16 | 15 | 16 | 19 | 19 | 18 | 19 | 17 | 17 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Central Islip vs another city
- Central Islip vs Islip Terrace, NY
- Central Islip vs Hauppauge, NY
- Central Islip vs Bohemia, NY
- Central Islip vs Islip, NY
- Central Islip vs North Bay Shore, NY
- Central Islip vs New York, NY
- Central Islip vs Los Angeles, CA
- Central Islip vs Chicago, IL
- Central Islip vs Houston, TX
- Central Islip vs Phoenix, AZ
- Central Islip vs Philadelphia, PA
Ronkonkoma vs another city
- Ronkonkoma vs Bohemia, NY
- Ronkonkoma vs Lake Ronkonkoma, NY
- Ronkonkoma vs Holbrook, NY
- Ronkonkoma vs Nesconset, NY
- Ronkonkoma vs Lake Grove, NY
- Ronkonkoma vs New York, NY
- Ronkonkoma vs Los Angeles, CA
- Ronkonkoma vs Chicago, IL
- Ronkonkoma vs Houston, TX
- Ronkonkoma vs Phoenix, AZ
- Ronkonkoma vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).