Mattawa Weather in January-February: With the air being damp (Humidity is 80%) and temperature being as low as -11℉, you can expect cold weather on your visit to Mattawa in these months. The average temperature is 23℉. The average precipitation recorded around this time is 58.54 mm.

Mattawa Weather in March: The temperature is cold throughout the month, the average temperature being 21℉. The air is slightly humid and expect to feel colder than usual. Unless you are very sure about the activities you want to do, this is not a very ideal time to visit Mattawa. The average precipitation recorded around this time is 23.06 mm.

Mattawa Weather in April: Temperatures ranging from 14℉ to 61℉ call for delightful afternoon explorations of Mattawa. Mornings and evening can be a tad difficult to get out owing to the humidity reaching 74% making the weather cooler. Perfect to bank on all that napping! Expect an average precipitation of 79.63 mm.

Mattawa Weather in May: With an average temperature of 51℉ and slightly more humidity in the air, makes for cooler afternoons in Mattawa. Make sure you carry light woollens as evening can get a bit chilly. This time period sees an average precipitation of 65.05 mm.

Mattawa Weather in June: If you are contemplating the best time to visit Mattawa, the month of June fits the bill just right. The weather is nice and sultry with the lowest temperature being around 36℉ and the warmest being a usual 81℉. Albeit a humidity of 72%, June marks a good time to explore the best things to do in Mattawa. Expect an average precipitation of 73.02 mm.

Mattawa Weather in July-September: The highest temperature recorded is 91℉ which would make you want to run to the nearest café to down a glass of chilled drink, but the moderate humidity of 78% makes this an excellent time to visit Mattawa. This time period sees an average precipitation of 54.63 mm.

Mattawa Weather in October: The air is moderately humid with average humidity being 79%. The temperature ranges between 30℉ to 70℉ and it is still cold in Mattawa. The high humidity in the air makes it feel colder, although the average temperature is 48℉. The average precipitation recorded around this time is 80.26 mm.

Mattawa Weather in November-December: With the air being damp (Humidity is 81%) and temperature being as low as -13℉, you can expect cold weather on your visit to Mattawa in these months. The average temperature is 25℉. The average precipitation recorded around this time is 79.04 mm.