Prosser Historic Weather Records

Analyse hottest, coldest, windiest & wettest days

Prosser Weather Trend Graph


Temperature (°C)
.
Months
Max Temp.
Historic Max Temp.
Min Temp.
Historic Min Temp.

Yearly Summary 2026


40°C
Highest Temp
22 Jul. 26

-9°C
Lowest Temp
24 Jan. 26


Seasonal Breakdown

Hottest MonthJuly34.72°C

Coldest MonthJanuary-2.2°C

Wettest MonthFebruary1.54mm

Windiest MonthJune23.33km/h

Frequently Asked Questions


1. What is the hottest month in Prosser historically?

July is historically Prosser's hottest month, with average maximum temperatures around 33°C. During peak heatwave events, the highest recorded temperatures have reached 46°C on 2021-06-29.

2. What is the coldest month in Prosser historically?

January is Prosser's coldest month, with average minimum temperatures around -2°C. The all-time record low of -20°C was recorded on 2017-01-13.

3. What is the average annual rainfall in Prosser over the past 17 years?

Prosser's average annual rainfall is approximately 241.8mm, based on records spanning 17 years.

4. How many rainy days does Prosser experience on average per year?

Prosser historically records approximately 106.5 rainy days per year. December has the highest number of rain days at an average of 14.8 days.

5. What is the all-time highest temperature ever recorded in Prosser?

The all-time highest temperature recorded in Prosser is 46°C on 2021-06-29.

6. What is the all-time lowest temperature ever recorded in Prosser?

The all-time lowest temperature recorded in Prosser is -20°C on 2017-01-13.

7. What is the windiest time of year in Prosser historically?

Prosser experiences its strongest winds during April. The historic gust record of 51.5 kph was recorded on 2025-12-17.

8. What is the highest and lowest humidity in Prosser during a year?

Usually, Prosser's humidity peaks in January at around 82.01% and drops to its lowest in July at approximately 35.8%.