Center Moriches has chilly, snowy winters and pleasant summers
A typical July afternoon reaches 82°, a January night drops to 24°, and about 32 inches of snow falls in a normal winter.
A year in Center Moriches at a glance
Each month’s typical high and low, and what it brings.
What stands out about Center Moriches’s climate
Read from where Center Moriches sits among New York’s towns. The page puts what stands out first.
What a year in Center Moriches feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Warmer than it used to be
The last 30 years in Center Moriches averaged 2.2° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 98% of U.S. towns.
Change by month
Living with Center Moriches’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
193 frost-free days. The last frost comes by Apr 18 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 28.
About 32" a winter over 8 days with an inch or more, most in January. Snow covers the ground about 23 days a year.
Months averaging under 55° run from November through April. Heating is 87% of the year’s heating-and-cooling load.
About 7 days a year reach 90°, and July afternoons average 82°.
The nicest months are May, June, July, August, September and October. 6.7 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →32 inches of snow, 46 of rain and melt
December is the wettest month and July the driest. Rain or snow falls on about 122 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 193 frost-free days a year
In half of years the last 32° night comes by April 18 and the first by October 28.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Center Moriches and its neighbors
East Moriches has the coldest January nights next door (24°) and Moriches the hottest July afternoons (82°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
How Center Moriches compares
Against every U.S. town on TownTapestry, each counted once, with its place in New York.
Center Moriches weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 40° | 24° | 3.5" | 10.3" | 11 | 7 | 24° – 38° |
| February | 41° | 25° | 3.2" | 9.4" | 10 | 9 | 21° – 39° |
| March | 48° | 31° | 4.6" | 6.5" | 11 | 4 | 34° – 47° |
| April | 58° | 40° | 4.0" | 0.6" | 11 | 0 | 45° – 53° |
| May | 67° | 49° | 3.3" | 0 | 12 | 0 | 54° – 62° |
| June | 76° | 59° | 4.0" | 0 | 10 | 0 | 65° – 71° |
| July | 82° | 66° | 3.1" | 0 | 9 | 0 | 69° – 77° |
| August | 81° | 65° | 3.7" | 0 | 9 | 0 | 69° – 76° |
| September | 74° | 58° | 3.8" | 0 | 9 | 0 | 64° – 70° |
| October | 64° | 47° | 4.3" | 0 | 9 | 0 | 52° – 61° |
| November | 54° | 38° | 3.6" | 0.5" | 10 | 0 | 41° – 50° |
| December | 45° | 30° | 4.7" | 4.5" | 12 | 3 | 30° – 48° |
| Year | 61° | 44° | 45.8" | 31.8" | 122 | 23 |
Heating and cooling a home in Center Moriches
87% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 21° to 39°. June is the most reliable, staying within 6°.
Common questions about Center Moriches’s climate
What is the coldest month in Center Moriches?
January, with a typical high of 40° and a low of 24°.
What is the hottest month in Center Moriches?
July, with a typical high of 82° and a low of 66°. About 7 days a year reach 90°.
How much snow does Center Moriches get?
About 32 inches in a normal winter, most of it in January.
When is the first frost in Center Moriches?
In half of years the first 32° night comes by October 28, and the last spring frost by April 18.
What is the rainiest month in Center Moriches?
December, with 4.7 inches of rain and melted snow. The year totals 46 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Center Moriches.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Center Moriches itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Islip Li Macarthur Airport, NY (16 mi, snow) and Shirley Brookhaven Airport, NY (4 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.