Jefferson Weather Forecast 15 Days, Weather in Jefferson Today
Current weather conditions and 15 day weather forecast for Jefferson, 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 Jefferson
| 22 June 2026 Monday 15.3 ° C / 59.5°F  Overcast |
Feels Like : 15.3 ° C / 59.5°F Humidity : % 86 Pressure : 1013 mb Wind Speed : 18.4 kmph / 11.4 miles from NE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Jefferson, IL, USA
Weather Forecast for next 15 Days for Jefferson 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 Jefferson, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 22 June 2026 Monday |  Patchy rain nearby |
12.2 ° C (54°F) |
22.4 ° C (72.3°F) |
17.5 ° C (63.5°F) |
% 79 | 36% | 8.6 | Sunrise:05:23 AM Sunset: 08:39 PM |
Moonrise:01:59 PM Moonset: 12:52 AM Moon Phase ( First Quarter ) |
|
| 23 June 2026 Tuesday | Patchy rain nearby |
12.3 ° C (54.1°F) |
23.3 ° C (74°F) |
18 ° C (64.4°F) |
% 78 | 20% | 8.7 | Sunrise:05:23 AM Sunset: 08:39 PM |
Moonrise:03:09 PM Moonset: 01:14 AM Moon Phase ( Waxing Gibbous ) |
|
| 24 June 2026 Wednesday | Patchy rain nearby |
14.4 ° C (57.9°F) |
23.2 ° C (73.7°F) |
18.6 ° C (65.6°F) |
% 83 | 57% | 6.6 | Sunrise:05:24 AM Sunset: 08:40 PM |
Moonrise:04:18 PM Moonset: 01:37 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 June 2026 Thursday |  Sunny |
13.2 ° C (55.7°F) |
22.8 ° C (73.1°F) |
18.3 ° C (64.9°F) |
% 78 | 11% | 8.7 | Sunrise:05:24 AM Sunset: 08:40 PM |
Moonrise:05:27 PM Moonset: 02:04 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 June 2026 Friday | Sunny |
13.1 ° C (55.7°F) |
24.5 ° C (76°F) |
17.8 ° C (64°F) |
% 81 | 12% | 0.5 | Sunrise:05:24 AM Sunset: 08:40 PM |
Moonrise:06:33 PM Moonset: 02:36 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 June 2026 Saturday | Patchy rain nearby |
16.9 ° C (62.5°F) |
25.6 ° C (78.1°F) |
21.6 ° C (70.9°F) |
% 93 | 52% | 5 | Sunrise:05:25 AM Sunset: 08:40 PM |
Moonrise:07:35 PM Moonset: 03:15 AM Moon Phase ( Full Moon ) |
|
| 28 June 2026 Sunday | Patchy rain nearby |
22.2 ° C (72°F) |
29.7 ° C (85.4°F) |
25.7 ° C (78.3°F) |
% 86 | 33% | 6 | Sunrise:05:25 AM Sunset: 08:40 PM |
Moonrise:08:28 PM Moonset: 04:02 AM Moon Phase ( Full Moon ) |
|
| 29 June 2026 Monday |  Moderate rain |
23.4 ° C (74.1°F) |
29.3 ° C (84.7°F) |
26 ° C (78.7°F) |
% 89 | 83% | 6 | Sunrise:05:26 AM Sunset: 08:40 PM |
Moonrise:09:13 PM Moonset: 04:56 AM Moon Phase ( Full Moon ) |
|
| 30 June 2026 Tuesday | Sunny |
17.5 ° C (63.5°F) |
25.3 ° C (77.6°F) |
21.2 ° C (70.2°F) |
% 78 | 9% | 6 | Sunrise:05:26 AM Sunset: 08:40 PM |
Moonrise:09:49 PM Moonset: 05:56 AM Moon Phase ( Full Moon ) |
|
| 01 July 2026 Wednesday | Sunny |
16.8 ° C (62.3°F) |
26.7 ° C (80°F) |
22.2 ° C (72°F) |
% 77 | 9% | 6 | Sunrise:05:27 AM Sunset: 08:39 PM |
Moonrise:10:19 PM Moonset: 06:59 AM Moon Phase ( Waning Gibbous ) |
|
| 02 July 2026 Thursday | Patchy rain nearby |
20 ° C (68°F) |
28.4 ° C (83.2°F) |
24.4 ° C (76°F) |
% 82 | 71% | 5 | Sunrise:05:27 AM Sunset: 08:39 PM |
Moonrise:10:43 PM Moonset: 08:03 AM Moon Phase ( Waning Gibbous ) |
|
| 03 July 2026 Friday | Sunny |
15.6 ° C (60°F) |
27.1 ° C (80.7°F) |
21.6 ° C (71°F) |
% 80 | 9% | 6 | Sunrise:05:28 AM Sunset: 08:39 PM |
Moonrise:11:04 PM Moonset: 09:06 AM Moon Phase ( Waning Gibbous ) |
|
| 04 July 2026 Saturday | Sunny |
21.3 ° C (70.3°F) |
31 ° C (87.8°F) |
26.1 ° C (78.9°F) |
% 86 | 13% | 7 | Sunrise:05:28 AM Sunset: 08:39 PM |
Moonrise:11:24 PM Moonset: 10:09 AM Moon Phase ( Waning Gibbous ) |
|
| 05 July 2026 Sunday | Patchy rain nearby |
17.6 ° C (63.8°F) |
20 ° C (68°F) |
18.7 ° C (65.6°F) |
% 90 | 55% | 4 | Sunrise:05:29 AM Sunset: 08:39 PM |
Moonrise:11:42 PM Moonset: 11:10 AM Moon Phase ( Last Quarter ) |
|
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