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United States › New Hampshire › Grafton County › Climate Station WENTWORTH, NH US Distance 5.5 mi Normals 1991–2020

30-year climate normals

Grafton County Climate and Weather Averages

Hottest month — July

82.0°

average daily high. The coldest month is January, averaging a low of 7.0°F.

Grafton County gets 42.9" of precipitation a year and 76.5" of snow, and 29% of it falls in Jun, Jul, Aug.

Temperature through the year

Each bar spans the average daily low to the average daily high for that month.

20° 40° 60° 80° JanFebMarAprMayJunJulAugSepOctNovDec
MonthAvg highAvg low PrecipSnow
January 29.4° 7.0° 2.75" 17.8"
February 33.1° 8.0° 2.30" 20.2"
March 42.2° 17.4° 3.01" 13.3"
April 55.5° 29.0° 3.35" 3.2"
May 68.4° 40.1° 3.56" 0.1"
June 76.6° 49.9° 4.12" 0.0"
July 82.0° 55.2° 4.61" 0.0"
August 80.7° 53.1° 3.87" 0.0"
September 72.5° 46.4° 3.62" 0.0"
October 58.6° 35.3° 4.66" 0.8"
November 46.3° 25.3° 3.50" 3.0"
December 35.2° 15.6° 3.55" 18.1"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 29% falling in the wettest three months (Jun, Jul, Aug).

January 2.75"
February 2.30"
March 3.01"
April 3.35"
May 3.56"
June 4.12"
July 4.61"
August 3.87"
September 3.62"
October 4.66"
November 3.50"
December 3.55"
Annual total 42.9"

What this climate costs you

Degree days measure how hard a building has to work to stay comfortable. They are the reason two identical houses have very different power bills, and they are the link between the weather here and what you pay every month.

Cooling degree days How much air conditioning the climate demands 333
Heating degree days How much heating the climate demands 7,847
Approximate annual cooling cost At 27.33¢/kWh, New Hampshire average $91
Approximate annual electric heating cost Lower where heating is gas rather than electric $751

These are rough planning figures from degree days and the state electricity price, not a bill estimate. House size, insulation and fuel type move them a lot. See the full cost of owning a home in Grafton County, where electricity is one line of eight.

Common questions

What is the weather like in Grafton County?

Grafton County averages a high of 82.0°F in July and a low of 7.0°F in January. Annual precipitation is 42.9 inches, including 76.5 inches of snow.

When is the rainy season in Grafton County?

The wettest stretch is Jun, Jul, Aug, which accounts for 29% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Grafton County?

The average daily high in July, the hottest month, is 82.0°F. That drives 333 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Grafton County?

Yes. Grafton County averages 76.5 inches of snow a year.

Sources

  • Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station WENTWORTH, NH US (USC00279091), 5.5 miles from the county centroid.
  • Heating and cooling degree days — NOAA, same station and period.
  • Electricity price — US Energy Information Administration, Electric Power Monthly Table 5.6.A, New Hampshire residential average.
  • Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.