Our verdict
The best time to visit Eureka is November
The warmest month of the year in Eureka is July, where the average temperature gets to around 20℃ (69℉), but temperatures can reach as high as 22℃ (72℉) on the hottest days in summer. The weather at night in the winter, which is around February-time, can get down to a minimum of 4℃ (40℉).
The days are longest in Eureka in August, so if you want to see the sights during the day when the sun is up for the longest time, it’s best to visit around that time of year. The wet season in Eureka falls around December, so if you prefer the dryer weather, you should look to visit in July instead.
Learn more about when to travel to Eureka, the monthly weather breakdown, FAQs and much more below. Once you’ve decided when you want to go, use our handy tools to find the best prices to suit your budget on flights, transport/transfers, places to stay, and loads more!
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Eureka seasons
Before you continue, it’s important to know when the seasons are in Eureka as they might be different to yours depending on where in the world you’re travelling from. Eureka is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Eureka
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Eureka for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Eureka climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Eureka for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Eureka in January
- Average temperature: 9℃ (49℉)
- Average high temperature: 12℃ (54℉)
- Average low temperature: 7℃ (44℉)
- Average humidity: 78%
- Average sunny days: 20 days
- Average rainfall: 32mm (1") over 10 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in January, make sure you pack a warm jacket or coat.
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Eureka in February
- Average temperature: 9℃ (48℉)
- Average high temperature: 12℃ (53℉)
- Average low temperature: 6℃ (43℉)
- Average humidity: 80%
- Average sunny days: 18 days
- Average rainfall: 28mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in February, make sure you pack a warm jacket or coat.
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Eureka in March
- Average temperature: 9℃ (48℉)
- Average high temperature: 12℃ (54℉)
- Average low temperature: 6℃ (43℉)
- Average humidity: 82%
- Average sunny days: 18 days
- Average rainfall: 26mm (1") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in March, make sure you pack a warm jacket or coat.
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Eureka in April
- Average temperature: 10℃ (50℉)
- Average high temperature: 13℃ (56℉)
- Average low temperature: 7℃ (45℉)
- Average humidity: 80%
- Average sunny days: 20 days
- Average rainfall: 18mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in April, make sure you pack a warm jacket or coat.
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Eureka in May
- Average temperature: 12℃ (54℉)
- Average high temperature: 15℃ (60℉)
- Average low temperature: 8℃ (47℉)
- Average humidity: 81%
- Average sunny days: 23 days
- Average rainfall: 17mm (1") over 6 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in May, make sure you pack a warm jacket or coat.
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Eureka in June
- Average temperature: 14℃ (57℉)
- Average high temperature: 18℃ (64℉)
- Average low temperature: 10℃ (50℉)
- Average humidity: 81%
- Average sunny days: 26 days
- Average rainfall: 3mm (0") over 3 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in June, make sure you pack a warm jacket or coat.
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Eureka in July
- Average temperature: 16℃ (60℉)
- Average high temperature: 20℃ (68℉)
- Average low temperature: 11℃ (53℉)
- Average humidity: 80%
- Average sunny days: 27 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in July, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
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Eureka in August
- Average temperature: 16℃ (60℉)
- Average high temperature: 20℃ (69℉)
- Average low temperature: 12℃ (53℉)
- Average humidity: 81%
- Average sunny days: 27 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in August, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
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Eureka in September
- Average temperature: 15℃ (59℉)
- Average high temperature: 20℃ (68℉)
- Average low temperature: 11℃ (52℉)
- Average humidity: 77%
- Average sunny days: 26 days
- Average rainfall: 6mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in September, make sure you pack a warm jacket or coat.
Eureka in October
- Average temperature: 13℃ (56℉)
- Average high temperature: 17℃ (63℉)
- Average low temperature: 10℃ (50℉)
- Average humidity: 76%
- Average sunny days: 25 days
- Average rainfall: 13mm (1") over 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in October, make sure you pack a warm jacket or coat.
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Eureka in November
- Average temperature: 11℃ (51℉)
- Average high temperature: 14℃ (57℉)
- Average low temperature: 8℃ (46℉)
- Average humidity: 78%
- Average sunny days: 22 days
- Average rainfall: 25mm (1") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in November, make sure you pack a warm jacket or coat.
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Eureka in December
- Average temperature: 9℃ (48℉)
- Average high temperature: 12℃ (53℉)
- Average low temperature: 6℃ (43℉)
- Average humidity: 78%
- Average sunny days: 19 days
- Average rainfall: 44mm (2") over 11 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Eureka in December, make sure you pack a warm jacket or coat.
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