Weather forecast - March 21, 2023 - P1

Climate and Average Weather Year Round in Holtsville New York, United States

In Holtsville, the summers are warm and humid; the winters are very cold, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 25°F to 82°F and is rarely below 11°F or above 89°F.

Based on the tourism score, the best time of year to visit Holtsville for warm-weather activities is from mid June to late September.

Average Temperature in Holtsville 

The warm season lasts for 3.4 months, from June 5 to September 18, with an average daily high temperature above 73°F. The hottest month of the year in Holtsville is July, with an average high of 81°F and low of 67°F.

The cold season lasts for 3.3 months, from December 5 to March 15, with an average daily high temperature below 47°F. The coldest month of the year in Holtsville is January, with an average low of 26°F and high of 39°F.

Rainfall 

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Holtsville experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Holtsville. The month with the most rain in Holtsville is April, with an average rainfall of 3.8 inches.

The month with the least rain in Holtsville is February, with an average rainfall of 2.5 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Holtsville experiences significant seasonal variation in monthly snowfall.

The snowy period of the year lasts for 4.4 months, from November 24 to April 4, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Holtsville is January, with an average snowfall of 5.7 inches.

The snowless period of the year lasts for 7.6 months, from April 4 to November 24. The least snow falls around July 29, with an average total accumulation of 0.0 inches.

Weather forecast - March 21, 2023

Weather 00501

High temperature : 42°F

Low temperature : 37°F

- Overcast clouds, Wind speed 8.05 mph, wind out of the SW. Visibility 7 mi, humidity 80% . Chance of Rain : 0 % .

Today's Air Quality - Weather 00501 : Poor

- Air Quality Index : CO : 293.73 ; NH3 : 1.22 ; NO : 0 ; NO2 : 11.31 ; O3 : 107.29 ; PM10 : 15.92 ; PM2.5 : 13.63 ; SO2 : 3.79

 

Weather 00544

High temperature : 42°F

Low temperature : 37°F

- Overcast clouds, Wind speed 8.05 mph, wind out of the SW. Visibility 7 mi, humidity 80% . Chance of Rain : 0 % .

Today's Air Quality - Weather 00544 : Poor

- Air Quality Index : CO : 293.73 ; NH3 : 1.22 ; NO : 0 ; NO2 : 11.31 ; O3 : 107.29 ; PM10 : 15.92 ; PM2.5 : 13.63 ; SO2 : 3.79

 

Weather 00601

High temperature : 73°F

Low temperature : 65°F

- Overcast clouds, Wind speed 5.99 mph, wind out of the SE. Visibility 7 mi, humidity 86% . Chance of Rain : 7 % .

Today's Air Quality - Weather 00601 : Good

- Air Quality Index : CO : 170.23 ; NH3 : 0.72 ; NO : 0 ; NO2 : 0.27 ; O3 : 31.11 ; PM10 : 8.4 ; PM2.5 : 5.14 ; SO2 : 0.19

 

Weather 00602

High temperature : 79°F

Low temperature : 72°F

- Overcast clouds, Wind speed 1.01 mph, wind out of the W. Visibility 7 mi, humidity 88% . Chance of Rain : 0 % .

Today's Air Quality - Weather 00602 : Good

- Air Quality Index : CO : 176.91 ; NH3 : 1.5 ; NO : 0 ; NO2 : 0.55 ; O3 : 25.39 ; PM10 : 4.01 ; PM2.5 : 3.14 ; SO2 : 0.37

 

Weather 53213

High temperature : 34°F

Low temperature : 27°F

- Overcast clouds, Wind speed 5.01 mph, wind out of the NW. Visibility 7 mi, humidity 85% . Chance of Rain : 0 % .

Today's Air Quality - Weather 53213 : Poor

- Air Quality Index : CO : 407.22 ; NH3 : 12.16 ; NO : 0 ; NO2 : 20.91 ; O3 : 52.93 ; PM10 : 34.1 ; PM2.5 : 31.74 ; SO2 : 1.37

Weather 00604

High temperature : 78°F

Low temperature : 72°F

- Overcast clouds, Wind speed 0 mph, wind out of the N. Visibility 7 mi, humidity 88% . Chance of Rain : 0 % .

Today's Air Quality - Weather 00604 : Moderate

- Air Quality Index : CO : 193.6 ; NH3 : 0.02 ; NO : 0 ; NO2 : 0.29 ; O3 : 70.1 ; PM10 : 9.56 ; PM2.5 : 5.96 ; SO2 : 0.48

 

Weather 00605

High temperature : 79°F

Low temperature : 72°F

- Overcast clouds, Wind speed 0 mph, wind out of the N. Visibility 7 mi, humidity 89% . Chance of Rain : 0 % .

Today's Air Quality - Weather 00605 : Moderate

- Air Quality Index : CO : 193.6 ; NH3 : 0.02 ; NO : 0 ; NO2 : 0.29 ; O3 : 70.1 ; PM10 : 9.56 ; PM2.5 : 5.96 ; SO2 : 0.48

 

Weather 00606

High temperature : 74°F

Low temperature : 67°F

- Overcast clouds, Wind speed 1.99 mph, wind out of the N. Visibility 7 mi, humidity 69% . Chance of Rain : 8 % .

Today's Air Quality - Weather 00606 : Good

- Air Quality Index : CO : 168.56 ; NH3 : 0.63 ; NO : 0 ; NO2 : 0.3 ; O3 : 25.39 ; PM10 : 7.54 ; PM2.5 : 4.66 ; SO2 : 0.19

 

Weather 00610

High temperature : 79°F

Low temperature : 73°F

- Overcast clouds, Wind speed 5.01 mph, wind out of the ESE. Visibility 7 mi, humidity 87% . Chance of Rain : 5 % .

Today's Air Quality - Weather 00610 : Good

- Air Quality Index : CO : 176.91 ; NH3 : 1.5 ; NO : 0 ; NO2 : 0.55 ; O3 : 25.39 ; PM10 : 4.01 ; PM2.5 : 3.14 ; SO2 : 0.37

 

Weather 00611

High temperature : 75°F

Low temperature : 68°F

- Overcast clouds, Wind speed 5.99 mph, wind out of the SE. Visibility 7 mi, humidity 88% . Chance of Rain : 7 % .

Today's Air Quality - Weather 00611 : Good

- Air Quality Index : CO : 181.91 ; NH3 : 0.88 ; NO : 0 ; NO2 : 0.35 ; O3 : 46.49 ; PM10 : 9.53 ; PM2.5 : 6.07 ; SO2 : 0.28