30-year climate normals

Josephine County Climate and Weather Averages

Hottest month — July

76.7°

average daily high. The coldest month is December, averaging a low of 32.3°F.

Josephine County gets 40.66" of precipitation a year, and 50% of it falls in Nov, Dec, Jan.

Temperature through the year

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

Month	Avg high	Avg low	Precip
January	43.1°	33.3°	6.44"
February	43.7°	32.7°	5.19"
March	46.3°	33.1°	4.89"
April	51.8°	35.1°	3.00"
May	61.0°	41.1°	2.19"
June	67.7°	45.6°	0.94"
July	76.7°	53.1°	0.29"
August	76.7°	53.9°	0.28"
September	70.4°	50.7°	0.84"
October	58.3°	43.4°	2.88"
November	46.7°	36.3°	5.58"
December	41.3°	32.3°	8.14"

Rainfall by month

Josephine County has a distinct wet season. 50% of the year's precipitation arrives in Nov, Dec, Jan.

January 6.44"

February 5.19"

March 4.89"

April 3.00"

May 2.19"

June 0.94"

July 0.29"

August 0.28"

September 0.84"

October 2.88"

November 5.58"

December 8.14"

Annual total 40.66"

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 276

Heating degree days How much heating the climate demands 6,116

Approximate annual cooling cost At 16.27¢/kWh, Oregon average $45

Approximate annual electric heating cost Lower where heating is gas rather than electric $348

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 Josephine County, where electricity is one line of eight.

Common questions

What is the weather like in Josephine County?

Josephine County averages a high of 76.7°F in July and a low of 32.3°F in December. Annual precipitation is 40.66 inches, with essentially no snow.

When is the rainy season in Josephine County?

The wettest stretch is Nov, Dec, Jan, which accounts for 50% of the year's precipitation. That is a pronounced wet season rather than rain spread evenly through the year.

How hot does it get in Josephine County?

The average daily high in July, the hottest month, is 76.7°F. That drives 276 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Josephine County?

Effectively no. Measurable snowfall is rare in Josephine County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station SEXTON SUMMIT, OR US (USW00024235), 18.1 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, Oregon residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.