This weather has a price Keeping the median Slope County home comfortable runs roughly $473 a year in heating and cooling alone. See where it lands in the monthly bill

30-year climate normals

Slope County Climate and Weather Averages

Hottest month: August

82.2°

average daily high. The coldest month is January, averaging a low of 8.7°F.

Slope County gets 17.45" of precipitation a year, and 44% of it falls in May, Jun, Jul.

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	26.7°	8.7°	0.62"
February	29.3°	11.0°	0.51"
March	40.9°	20.7°	0.90"
April	52.7°	30.8°	1.78"
May	64.2°	42.2°	2.66"
June	73.8°	51.7°	2.54"
July	82.1°	57.9°	2.43"
August	82.2°	55.9°	1.69"
September	71.6°	46.4°	1.84"
October	55.0°	33.6°	1.23"
November	39.9°	21.2°	0.67"
December	29.1°	11.5°	0.58"

Rainfall by month

Precipitation is spread fairly evenly through the year here, with 44% falling in the wettest three months (May, Jun, Jul).

January 0.62"

February 0.51"

March 0.90"

April 1.78"

May 2.66"

June 2.54"

July 2.43"

August 1.69"

September 1.84"

October 1.23"

November 0.67"

December 0.58"

Annual total 17.45"

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 439

Heating degree days How much heating the climate demands 8,313

Approximate annual cooling cost At 14.12¢/kWh, North Dakota average $62

Approximate annual electric heating cost Lower where heating is gas rather than electric $411

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 Slope County, where electricity is one line of eight.

Common questions

What is the weather like in Slope County?

Slope County averages a high of 82.2°F in August and a low of 8.7°F in January. Annual precipitation is 17.45 inches, with essentially no snow.

When is the rainy season in Slope County?

The wettest stretch is May, Jun, Jul, which accounts for 44% of the year's precipitation. Precipitation is relatively evenly distributed across the year.

How hot does it get in Slope County?

The average daily high in August, the hottest month, is 82.2°F. That drives 439 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Slope County?

The weather station used for Slope County, MEDORA 7 E, ND US, reports temperature and precipitation but not snowfall, so there is no snow normal to quote here. Precipitation that falls as snow is still counted in the 17.45 inches above, measured as melted water.

Sources

Temperature, precipitation and snowfall normals: NOAA National Centers for Environmental Information, 1991 to 2020 Monthly Climate Normals, station MEDORA 7 E, ND US (USW00094080), 31.3 miles from the county centroid.
Heating and cooling degree days: NOAA, same station and period.
Annual figures on this page are the sum of that station's twelve monthly normals. NOAA also publishes a separately-computed annual normal, which can differ from the monthly sum by a few percent; we use the monthly series because the month-by-month breakdown above has to come from it.
Electricity price: US Energy Information Administration, Electric Power Monthly Table 5.6.A, North Dakota residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.