Port Byron Weather Forecast 15 Days, Weather in Port Byron Today
Current weather conditions and 15 day weather forecast for Port Byron, 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 Port Byron
| 20 December 2025 Saturday -6.7 ° C / 19.9°F  Overcast |
Feels Like : -12.8 ° C / 9°F Humidity : % 77 Pressure : 1013 mb Wind Speed : 15.5 kmph / 9.6 miles from SSE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Port Byron, IL, USA
Weather Forecast for next 15 Days for Port Byron 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 Port Byron, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 December 2025 Friday |  Partly Cloudy |
-13.6 ° C (7.5°F) |
-6.8 ° C (19.8°F) |
-10.2 ° C (13.6°F) |
% 74 | 0% | 0.3 | Sunrise:07:24 AM Sunset: 04:34 PM |
Moonrise:07:27 AM Moonset: 03:57 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Overcast |
-7.9 ° C (17.8°F) |
1.8 ° C (35.2°F) |
-1.3 ° C (29.6°F) |
% 82 | 0% | 0.2 | Sunrise:07:25 AM Sunset: 04:34 PM |
Moonrise:08:18 AM Moonset: 04:52 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday |  Sunny |
-6.6 ° C (20.1°F) |
-1 ° C (30.2°F) |
-3.5 ° C (25.7°F) |
% 76 | 0% | 0.3 | Sunrise:07:25 AM Sunset: 04:35 PM |
Moonrise:09:02 AM Moonset: 05:55 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Overcast |
-2.9 ° C (26.8°F) |
0.9 ° C (33.6°F) |
-0.7 ° C (30.7°F) |
% 80 | 0% | 0.1 | Sunrise:07:26 AM Sunset: 04:35 PM |
Moonrise:09:38 AM Moonset: 07:01 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Sunny |
0.8 ° C (33.4°F) |
6.8 ° C (44.2°F) |
3 ° C (37.3°F) |
% 85 | 0% | 0.3 | Sunrise:07:26 AM Sunset: 04:36 PM |
Moonrise:10:08 AM Moonset: 08:08 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Patchy rain nearby |
0.3 ° C (32.5°F) |
6 ° C (42.8°F) |
2.5 ° C (36.4°F) |
% 86 | 86% | 0 | Sunrise:07:26 AM Sunset: 04:36 PM |
Moonrise:10:33 AM Moonset: 09:16 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Fog |
7 ° C (44.7°F) |
13.1 ° C (55.6°F) |
10.5 ° C (50.8°F) |
% 96 | 0% | 3 | Sunrise:07:27 AM Sunset: 04:37 PM |
Moonrise:10:56 AM Moonset: 10:23 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
3.6 ° C (38.4°F) |
8.6 ° C (47.4°F) |
8.5 ° C (47.4°F) |
% 76 | 0% | 3 | Sunrise:07:27 AM Sunset: 04:38 PM |
Moonrise:11:17 AM Moonset: 11:33 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Sunny |
-1 ° C (30.3°F) |
3.3 ° C (38°F) |
0.9 ° C (33.7°F) |
% 67 | 0% | 2 | Sunrise:07:27 AM Sunset: 04:38 PM |
Moonrise:11:39 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Overcast |
-0.6 ° C (30.8°F) |
3.9 ° C (39°F) |
1.8 ° C (35.3°F) |
% 70 | 0% | 1 | Sunrise:07:28 AM Sunset: 04:39 PM |
Moonrise:12:02 PM Moonset: 12:43 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Patchy rain nearby |
1.9 ° C (35.4°F) |
2.1 ° C (35.9°F) |
2.1 ° C (35.8°F) |
% 84 | 86% | 1 | Sunrise:07:28 AM Sunset: 04:40 PM |
Moonrise:12:28 PM Moonset: 01:57 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Patchy rain nearby |
1.9 ° C (35.4°F) |
2.5 ° C (36.6°F) |
2.2 ° C (35.9°F) |
% 89 | 85% | 1 | Sunrise:07:28 AM Sunset: 04:41 PM |
Moonrise:01:01 PM Moonset: 03:15 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Patchy rain nearby |
0.6 ° C (33°F) |
2 ° C (35.7°F) |
1.3 ° C (34.3°F) |
% 90 | 88% | 1 | Sunrise:07:28 AM Sunset: 04:42 PM |
Moonrise:01:43 PM Moonset: 04:35 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Sunny |
-1.9 ° C (28.5°F) |
6.1 ° C (43°F) |
1.2 ° C (34.1°F) |
% 81 | 0% | 2 | Sunrise:07:28 AM Sunset: 04:42 PM |
Moonrise:02:37 PM Moonset: 05:55 AM Moon Phase ( Waxing Gibbous ) |
|
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