The best times to visit Ronkonkoma for ideal weather are

May 7th to July 8th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Ronkonkoma Travel Info

Weather in Ronkonkoma


Average temperatures in Ronkonkoma vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 26th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Ronkonkoma, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 86.5°F (30.3°C) with temperatures rarely dropping below 68.7°F (20.4°C) at night.

Ronkonkoma Temperatures (Fahrenheit)


Ronkonkoma Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Ronkonkoma Perceived Temperature (F)


Ronkonkoma Perceived Temperature (C)



Average Ronkonkoma Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 39.3 31.3 23.2
Feb 40.7 31.5 22.9
Mar 49 39.4 30.9
Apr 60.2 50.1 41
May 71.4 61 52.2
Jun 79.1 69.1 60.6
Jul 85.1 76.1 68.2
Aug 82.7 73.8 65.1
Sep 77.1 67.8 59.3
Oct 66.5 57.1 48.5
Nov 55.8 46.1 37
Dec 48.1 40 32.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 4.1 -0.4 -4.9
Feb 4.8 -0.3 -5.1
Mar 9.4 4.1 -0.6
Apr 15.7 10.1 5
May 21.9 16.1 11.2
Jun 26.2 20.6 15.9
Jul 29.5 24.5 20.1
Aug 28.2 23.2 18.4
Sep 25.1 19.9 15.2
Oct 19.2 13.9 9.2
Nov 13.2 7.8 2.8
Dec 8.9 4.4 0.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ronkonkoma are November, September, and then October. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early July. For example, on the week of July 2nd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in late January with an average of 3 days of significant precipitation the week of January 22nd.

When can you find snow in Ronkonkoma? Weather stations report large amounts of snow likely to be deepest around February, especially close to late January and early February. The best time to ski (if at all) in Ronkonkoma is often around around January 15th when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Ronkonkoma.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Ronkonkoma (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 28% 6.8 4
Feb 23% 7.5 3
Mar 25% 4.7 4.3
Apr 20% 1.2 3.2
May 21% 0 3.4
Jun 25% 0 5.4
Jul 19% 0 2.9
Aug 20% 0 6.6
Sep 18% 0 3
Oct 19% 0 3.5
Nov 18% 2.1 3.1
Dec 27% 5.6 5.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 28 17.3 10.2
Feb 23 19.1 7.6
Mar 25 11.9 10.9
Apr 20 3 8.1
May 21 0 8.6
Jun 25 0 13.7
Jul 19 0 7.4
Aug 20 0 16.8
Sep 18 0 7.6
Oct 19 0 8.9
Nov 18 5.3 7.9
Dec 27 14.2 14


Humidity and Wind

Ronkonkoma has some slightly muggy months, with moderately humid months on the other side of the year. The least humid month is March (49.9% relative humidity), and the most humid month is September (64.5%).

Wind in Ronkonkoma is usually moderate. The windiest month is April, followed by March and February. April’s average wind speed of around 9.3 knots (10.7 MPH or 17.2 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in mid February where average top sustained speeds reach 17.6 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Ronkonkoma.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8.6 Gentle breeze 15.8 Significant breeze
Feb 8.8 Gentle breeze 16.6 Significant breeze
Mar 9.2 Gentle breeze 16.3 Significant breeze
Apr 9.3 Gentle breeze 16.5 Significant breeze
May 7.3 Gentle breeze 13.7 Significant breeze
Jun 7.2 Gentle breeze 13.8 Significant breeze
Jul 6.9 Light breeze 12.9 Significant breeze
Aug 6.5 Light breeze 12.8 Significant breeze
Sep 6.7 Light breeze 12.9 Significant breeze
Oct 7.7 Gentle breeze 14.2 Significant breeze
Nov 7.9 Gentle breeze 14.6 Significant breeze
Dec 8.3 Gentle breeze 15 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 51.5%
Feb 51.5%
Mar 49.9%
Apr 50.6%
May 62.7%
Jun 63.3%
Jul 63%
Aug 61.8%
Sep 64.5%
Oct 60.1%
Nov 54.9%
Dec 60.3%


Is it Safe to Travel to Ronkonkoma?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Ronkonkoma, NY, US is July, followed by October and February. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Ronkonkoma in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 52.8 in December means 52.8% of the tourists vs. July.



Overall Ronkonkoma Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 76.9°F (24.9°C) and 42°F (5.6°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 8 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 6 to 8 days of precipitation per month. June – August is the busiest season for tourism in Ronkonkoma, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 81.1°F (27.3°C) and 52.1°F (11.2°C), which will feel comfortable given the humidity and wind. It rains or snows a significant amount: 5 to 6 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Winter (December through February)

Weather is far too cold this time of year in Ronkonkoma to be enjoyable for warm weather travelers. The average high during this season is between 49.3°F (9.6°C) and 33.8°F (1°C). On average, it rains or snows a fair amount: 6 to 9 times per month. These times of year are the slowest with tourists.


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