Grafton Weather Forecast 15 Days, Weather in Grafton Today
Current weather conditions and 15 day weather forecast for Grafton, Illinois, 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 Grafton
| 10 May 2026 Sunday 16.1 ° C / 61°F  Partly cloudy |
Feels Like : 16.1 ° C / 61°F Humidity : % 54 Pressure : 1019 mb Wind Speed : 15.5 kmph / 9.6 miles from NNE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
15 day weather forecast for Grafton, IL, USA
Weather Forecast for next 15 Days for Grafton 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 Grafton, Illinois 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 May 2026 Sunday |  Patchy rain nearby |
11.8 ° C (53.2°F) |
25.1 ° C (77.2°F) |
17.7 ° C (63.8°F) |
% 53 | 70% | 6.5 | Sunrise:05:54 AM Sunset: 08:03 PM |
Moonrise:02:26 AM Moonset: 01:18 PM Moon Phase ( Waning Crescent ) |
|
| 11 May 2026 Monday |  Sunny |
8.6 ° C (47.4°F) |
21 ° C (69.8°F) |
15 ° C (59.1°F) |
% 58 | 0% | 7.9 | Sunrise:05:53 AM Sunset: 08:04 PM |
Moonrise:02:51 AM Moonset: 02:23 PM Moon Phase ( Waning Crescent ) |
|
| 12 May 2026 Tuesday | Patchy rain nearby |
11.1 ° C (52°F) |
25.1 ° C (77.1°F) |
18 ° C (64.4°F) |
% 66 | 89% | 0.3 | Sunrise:05:52 AM Sunset: 08:05 PM |
Moonrise:03:15 AM Moonset: 03:31 PM Moon Phase ( Waning Crescent ) |
|
| 13 May 2026 Wednesday | Patchy rain nearby |
11.6 ° C (52.8°F) |
23.9 ° C (75°F) |
17.9 ° C (64.2°F) |
% 69 | 85% | 4 | Sunrise:05:51 AM Sunset: 08:06 PM |
Moonrise:03:39 AM Moonset: 04:41 PM Moon Phase ( Waning Crescent ) |
|
| 14 May 2026 Thursday | Sunny |
10.5 ° C (50.8°F) |
24 ° C (75.2°F) |
17.2 ° C (62.9°F) |
% 62 | 0% | 5 | Sunrise:05:50 AM Sunset: 08:07 PM |
Moonrise:04:05 AM Moonset: 05:56 PM Moon Phase ( Waning Crescent ) |
|
| 15 May 2026 Friday | Partly Cloudy |
15.6 ° C (60.1°F) |
29.7 ° C (85.4°F) |
21.8 ° C (71.3°F) |
% 66 | 0% | 6 | Sunrise:05:49 AM Sunset: 08:08 PM |
Moonrise:04:35 AM Moonset: 07:14 PM Moon Phase ( Waning Crescent ) |
|
| 16 May 2026 Saturday |  Moderate rain |
19.2 ° C (66.6°F) |
27.9 ° C (82.2°F) |
22.5 ° C (72.5°F) |
% 78 | 88% | 5 | Sunrise:05:48 AM Sunset: 08:08 PM |
Moonrise:05:12 AM Moonset: 08:34 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday | Patchy rain nearby |
16.7 ° C (62°F) |
25.1 ° C (77.2°F) |
20.8 ° C (69.4°F) |
% 76 | 75% | 5 | Sunrise:05:48 AM Sunset: 08:09 PM |
Moonrise:05:59 AM Moonset: 09:52 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday | Sunny |
12.1 ° C (53.8°F) |
24.3 ° C (75.8°F) |
18.2 ° C (64.8°F) |
% 62 | 0% | 5 | Sunrise:05:47 AM Sunset: 08:10 PM |
Moonrise:06:57 AM Moonset: 11:01 PM Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday | Sunny |
15.1 ° C (59.1°F) |
29.6 ° C (85.3°F) |
22 ° C (71.5°F) |
% 66 | 0% | 6 | Sunrise:05:46 AM Sunset: 08:11 PM |
Moonrise:08:06 AM Moonset: 11:57 PM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Patchy rain nearby |
20.3 ° C (68.6°F) |
28.3 ° C (83°F) |
24 ° C (75.2°F) |
% 77 | 82% | 5 | Sunrise:05:45 AM Sunset: 08:12 PM |
Moonrise:09:21 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Sunny |
23.2 ° C (73.7°F) |
32.3 ° C (90.2°F) |
27.2 ° C (80.9°F) |
% 69 | 0% | 7 | Sunrise:05:44 AM Sunset: 08:13 PM |
Moonrise:10:37 AM Moonset: 12:42 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Patchy rain nearby |
22.1 ° C (71.8°F) |
33.4 ° C (92.1°F) |
26.8 ° C (80.3°F) |
% 73 | 71% | 6 | Sunrise:05:44 AM Sunset: 08:14 PM |
Moonrise:11:50 AM Moonset: 01:17 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Patchy rain nearby |
20.4 ° C (68.7°F) |
30 ° C (86°F) |
24.4 ° C (75.9°F) |
% 82 | 70% | 5 | Sunrise:05:43 AM Sunset: 08:14 PM |
Moonrise:12:58 PM Moonset: 01:45 AM Moon Phase ( First Quarter ) |
|
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