Northam Weather and Climate
Climate Snapshot
Northam's warmest month in 2024 was February, averaging 35.7 degrees. That gives Northam an annual average daytime high of 25.8 degrees, 1.7 degrees cooler than the Western Australia mean.
Daytime highs peak at 35.7 degrees in February and bottom out with overnight lows of 7.4 degrees in July. That is a 28.3 degree spread from hottest afternoon to coldest night. Overnight minimums average 13.0 degrees across the year, 4.7 degrees colder than the Western Australia average of 17.7.
Annual rainfall totals 337mm across 61 rain days, 40 percent drier than the Western Australia average. The wettest month is July at 83mm, and January is the driest at 1mm.
Rain is a winter affair here. The cooler months bring the bulk of the moisture, while summers stay relatively dry.
When we crunch the numbers on temperature, humidity, UV, and rainfall, October comes out as the sweet spot with a Comfort Score of 10.0 out of 10. February sits at the other end at 2.8.
Scroll down for the full month-by-month breakdown, or jump straight to October if you're picking the best time to visit Northam.
Monthly Comfort Score
Our Comfort Score rates each month from 1 (tough) to 10 (ideal) based on temperature, humidity, rainfall, UV, and sunshine. How we calculate it
Annual Comfort Score: 6.7/10 - Ranked #85 of 213 Australian cities (national avg 6.2, WA avg 6.0)
Seasonal Overview
| Season | Avg Max °C | Avg Min °C | Total Rain mm | Comfort |
|---|---|---|---|---|
| Summer | 34.4 | 18.7 | 18 | 4.0 |
| Autumn | 26.4 | 14.1 | 46 | 8.9 |
| Winter | 17.6 | 7.9 | 205 | 4.7 |
| Spring | 24.8 | 11.3 | 68 | 9.0 |
Monthly Climate Averages
| Month | Max °C | Min °C | Rain mm | Rain Days | Solar MJ | Humidity % | Comfort |
|---|
Weather by Month
Detailed climate data, packing advice, and what to expect for each month in Northam.
34.4°C, 1mm rain February
35.7°C, 16mm rain March
29.1°C, 14mm rain April
26.3°C, 6mm rain May
23.9°C, 26mm rain June
18.2°C, 58mm rain July
17.0°C, 83mm rain August
17.7°C, 64mm rain September
20.9°C, 16mm rain October
25.7°C, 20mm rain November
27.8°C, 33mm rain December
33.1°C, 2mm rain
Compare and Explore
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