What’s the climate like in Index?
The current climate of Index features average monthly temperatures ranging from highs of 25°C during the day to lows of 7°C. The average yearly temperature is around 16°C. At night, temperatures in the colder months average around 2°C and in the warmer months around 14°C.
The highest temperature recorded in Index in recent years was 40°C in June 2021. The lowest daytime temperature recorded was -5°C in December 2022.
On average, Index gets 937 mm of precipitation each year. Of this, about 208 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Index?
The best time to visit Index for sunny weather is May through September. During this period, you'll have good temperatures and not too much rain, making it a great time to visit Index. In the other months of the year, there's too much rain or the temperature isn't ideal for a visit if you want sunny and pleasant weather.
Climate Table of Index
The climate table of Index shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 9 | 9 | 12 | 15 | 19 | 22 | 25 | 25 | 21 | 16 | 11 | 7 |
| Temp. min (°C) | 3 | 3 | 4 | 7 | 10 | 13 | 14 | 15 | 12 | 9 | 5 | 3 |
| Precipitation |  |
|
|
|
|
|
|
|
|
|
|
|
| Precipitation (mm) | 111 | 148 | 111 | 66 | 44 | 39 | 12 | 17 | 51 | 95 | 126 | 117 |
| Snow (cm) | 27 | 65 | 45 | 5,5 | 0 | 0 | 0 | 0 | 0 | 0 | 8,4 | 56 |
| UV Index | 2 | 3 | 5 | 5 | 6 | 7 | 8 | 6 | 4 | 3 | 2 | 2 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 16°C
- Highest temperature: 25°C in July and August
- Lowest temperature: 7°C in December
- Precipitation*: 937 mm per year, averaging 78 mm per month
- Snowfall: 208 cm per year
- Driest months: 12 mm in July, 17 mm in August and 39 mm in June
- Wettest months: 148 mm in February, 126 mm in November and 117 mm in December
*Precipitation is measured as a combination of rain, snow, and hail
Plan your next holiday
Don’t miss the best holiday deals for Index and see what our partners have for you.
Table of Contents
Average Temperature per Month in Index
This graph shows the average maximum temperatures per month in Index, Washington. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Index
This graph shows how much precipitation Index, Washington, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Index
This graph shows how much snow Index, Washington, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Index
This graph shows the average UV index per month in Index, Washington. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Index
This graph shows the average yearly temperature in Index, Washington. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Index
This chart shows the total yearly precipitation in Index, Washington, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Index
This chart shows the total yearly snowfall in Index, Washington, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
Weather experiences in Index
Have you been to Index?
Share your weather experiences in Index.
Average Weather in Index by Month
Click on a month below to see detailed weather info for Index. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
