30-year climate normals

Monroe County Climate and Weather Averages

Hottest month — August

92.6°

average daily high. The coldest month is January, averaging a low of 53.1°F.

Monroe County gets 55.28" of precipitation a year, and 48% 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.

Month	Avg high	Avg low	Precip
January	77.1°	53.1°	1.70"
February	80.8°	55.7°	2.11"
March	83.3°	57.3°	2.28"
April	86.7°	62.0°	2.61"
May	90.3°	66.1°	3.71"
June	90.9°	72.4°	11.70"
July	92.5°	74.9°	7.44"
August	92.6°	75.3°	7.66"
September	91.1°	74.5°	9.05"
October	87.4°	70.0°	3.76"
November	83.2°	61.6°	1.45"
December	79.7°	57.4°	1.81"

Rainfall by month

Monroe County has a distinct wet season. 48% of the year's precipitation arrives in Jun, Jul, Aug.

January 1.70"

February 2.11"

March 2.28"

April 2.61"

May 3.71"

June 11.70"

July 7.44"

August 7.66"

September 9.05"

October 3.76"

November 1.45"

December 1.81"

Annual total 55.28"

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 4,136

Heating degree days How much heating the climate demands 230

Approximate annual cooling cost At 15.17¢/kWh, Florida average $627

Approximate annual electric heating cost Lower where heating is gas rather than electric $12

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 Monroe County, where electricity is one line of eight.

Common questions

What is the weather like in Monroe County?

Monroe County averages a high of 92.6°F in August and a low of 53.1°F in January. Annual precipitation is 55.28 inches, with essentially no snow.

When is the rainy season in Monroe County?

The wettest stretch is Jun, Jul, Aug, which accounts for 48% 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 Monroe County?

The average daily high in August, the hottest month, is 92.6°F. That drives 4,136 cooling degree days a year, which is what your air conditioning has to work against.

Does it snow in Monroe County?

Effectively no. Measurable snowfall is rare in Monroe County.

Sources

Temperature, precipitation and snowfall normals — NOAA National Centers for Environmental Information, 1991–2020 Monthly Climate Normals, station EVERGLADES CITY 5 NE, FL US (USW00092826), 28.4 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, Florida residential average.
Wet-season share is the wettest three consecutive months as a percentage of annual precipitation, calculated from the monthly normals.