United StatesThe weather in May in Hackettstown
It's warm in May in Hackettstown with an average temperature of 23°C. Temperatures this month range from a low of 18°C to a high of 28°C. At night, you can expect temperatures between 7°C and 15°C.
Looking for sun? May isn’t a good month to be in Hackettstown. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in May for Hackettstown, New Jersey. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2022, Hackettstown reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 6°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of -1°C to a highest value of 21°C.
Rainfall amount
In May, there is an average of 102 mm of precipitation, spread over 14 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in May for Hackettstown
Click on any day in May to get detailed info about the usual weather on that day in Hackettstown. Check out the historical temperatures and precipitation over the past 10 years on this day.
May weather comparison
| Hackettstown | New York | |
|---|---|---|
| Average temperature | 23°C | 22°C |
| Max. temperature | 28°C | 28°C |
| Min. temperature | 7°C | -5°C |
| Total precipitation | 102 mm | 105 mm |
| Rainy days | 14 days | 14 days |
Start of May
The month of May starts in Hackettstown with mild temps, averaging around 20°C during the day and nights around 9°C.
Mid May
By mid-May, daytime temps rise to around 23°C, with nights around 10°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of May
By the end of May, the average daytime temperature in Hackettstown is around 26°C, while nighttime temps are about 14°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Hackettstown for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in May in Hackettstown, New Jersey. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in May in Hackettstown
Temperature in May in Hackettstown over the years
Precipitation charts
These charts show the average amount of precipitation in May in Hackettstown, New Jersey. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in May in Hackettstown
Total precipitation in May in Hackettstown over the years
Daily UV index in May in Hackettstown
This chart shows the average daily UV index in May in Hackettstown, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in May in Hackettstown
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Average weather in Hackettstown by month
Click on a month below to see detailed weather info for Hackettstown. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.