Index Weather Forecast 15 Days, Weather in Index Today
Current weather conditions and 15 day weather forecast for Index, Washington, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Index
| 13 September 2026 Sunday 22.8 ° C / 73°F  Overcast |
Feels Like : 21.6 ° C / 70.9°F Humidity : % 46 Pressure : 1010 mb Wind Speed : 7.2 kmph / 4.5 miles from WNW  Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Index, WA, USA
Weather Forecast for next 15 Days for Index including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Index, Washington state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 12 September 2026 Saturday | Overcast |
11.1 ° C (52°F) |
24.3 ° C (75.7°F) |
16.5 ° C (61.7°F) |
% 67 | 67% | 3.5 | Sunrise:06:39 AM Sunset: 07:25 PM |
Moonrise:08:33 AM Moonset: 07:44 PM Moon Phase ( New Moon ) |
|
| 13 September 2026 Sunday |  Light rain shower |
9.1 ° C (48.4°F) |
10.9 ° C (51.6°F) |
10 ° C (49.9°F) |
% 98 | 94% | 0.6 | Sunrise:06:40 AM Sunset: 07:23 PM |
Moonrise:09:55 AM Moonset: 08:04 PM Moon Phase ( Waxing Crescent ) |
|
| 14 September 2026 Monday |  Patchy rain nearby |
9 ° C (48.2°F) |
16.4 ° C (61.5°F) |
11.7 ° C (53°F) |
% 80 | 66% | 3.7 | Sunrise:06:42 AM Sunset: 07:21 PM |
Moonrise:11:16 AM Moonset: 08:27 PM Moon Phase ( Waxing Crescent ) |
|
| 15 September 2026 Tuesday |  Cloudy |
7.2 ° C (45°F) |
17.7 ° C (63.9°F) |
11.4 ° C (52.5°F) |
% 77 | 22% | 4.5 | Sunrise:06:43 AM Sunset: 07:19 PM |
Moonrise:12:34 PM Moonset: 08:56 PM Moon Phase ( Waxing Crescent ) |
|
| 16 September 2026 Wednesday |  Sunny |
7.5 ° C (45.5°F) |
23.1 ° C (73.6°F) |
15.4 ° C (59.6°F) |
% 65 | 4% | 5.2 | Sunrise:06:44 AM Sunset: 07:17 PM |
Moonrise:01:48 PM Moonset: 09:32 PM Moon Phase ( First Quarter ) |
|
| 17 September 2026 Thursday | Sunny |
11.9 ° C (53.4°F) |
26.1 ° C (78.9°F) |
18.1 ° C (64.6°F) |
% 56 | 3% | 7 | Sunrise:06:46 AM Sunset: 07:15 PM |
Moonrise:02:52 PM Moonset: 10:19 PM Moon Phase ( First Quarter ) |
|
| 18 September 2026 Friday | Sunny |
14 ° C (57.3°F) |
28.2 ° C (82.8°F) |
20 ° C (68°F) |
% 46 | 1% | 7 | Sunrise:06:47 AM Sunset: 07:13 PM |
Moonrise:03:45 PM Moonset: 11:15 PM Moon Phase ( First Quarter ) |
|
| 19 September 2026 Saturday | Overcast |
12.6 ° C (54.6°F) |
24.7 ° C (76.4°F) |
18.1 ° C (64.6°F) |
% 56 | 8% | 6 | Sunrise:06:49 AM Sunset: 07:11 PM |
Moonrise:04:27 PM Moonset: Does not set today Moon Phase ( First Quarter ) |
|
| 20 September 2026 Sunday | Cloudy |
10.7 ° C (51.3°F) |
15.1 ° C (59.2°F) |
12.6 ° C (54.7°F) |
% 80 | 22% | 4 | Sunrise:06:50 AM Sunset: 07:08 PM |
Moonrise:04:58 PM Moonset: 12:19 AM Moon Phase ( Waxing Gibbous ) |
|
| 21 September 2026 Monday | Sunny |
9.8 ° C (49.6°F) |
19.5 ° C (67.1°F) |
13.8 ° C (56.9°F) |
% 74 | 8% | 5 | Sunrise:06:51 AM Sunset: 07:06 PM |
Moonrise:05:22 PM Moonset: 01:26 AM Moon Phase ( Waxing Gibbous ) |
|
| 22 September 2026 Tuesday |  Partly Cloudy |
9.5 ° C (49.2°F) |
21.4 ° C (70.5°F) |
14.7 ° C (58.5°F) |
% 72 | 8% | 6 | Sunrise:06:53 AM Sunset: 07:04 PM |
Moonrise:05:42 PM Moonset: 02:35 AM Moon Phase ( Waxing Gibbous ) |
|
| 23 September 2026 Wednesday | Sunny |
12.9 ° C (55.2°F) |
25.1 ° C (77.2°F) |
17.7 ° C (63.9°F) |
% 63 | 4% | 7 | Sunrise:06:54 AM Sunset: 07:02 PM |
Moonrise:05:58 PM Moonset: 03:44 AM Moon Phase ( Waxing Gibbous ) |
|
| 24 September 2026 Thursday | Sunny |
11.6 ° C (52.9°F) |
19.3 ° C (66.7°F) |
15.3 ° C (59.5°F) |
% 68 | 17% | 5 | Sunrise:06:55 AM Sunset: 07:00 PM |
Moonrise:06:13 PM Moonset: 04:51 AM Moon Phase ( Full Moon ) |
|
| 25 September 2026 Friday | Overcast |
8.8 ° C (47.8°F) |
19.6 ° C (67.3°F) |
13.4 ° C (56.1°F) |
% 69 | 36% | 4 | Sunrise:06:57 AM Sunset: 06:58 PM |
Moonrise:06:27 PM Moonset: 05:59 AM Moon Phase ( Full Moon ) |
|
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