Solar radiation in Chicago Weather Service Forecast Office Solar radiation 15 days
In the following list by days you can know the forecast of the predicted solar radiation. To know the data hour by hour, click on the day that interests you. If you have a solar panel system, these data will be useful to predict the energy it will produce.
The unit of measurement for solar radiation is expressed in W/m2 (Watts per square meter).
Solar radiation
Today, February 26
Total: 3214 wh/m2Hours07:0012 w/m2
08:00108 w/m2
09:00216 w/m2
10:00322 w/m2
11:00454 w/m2
12:00534 w/m2
13:00482 w/m2
14:00462 w/m2
15:00373 w/m2
16:00212 w/m2
17:0039 w/m2
Tomorrow, February 27
Total: 3226 wh/m2Hours07:0028 w/m2
08:00177 w/m2
09:00318 w/m2
10:00414 w/m2
11:00458 w/m2
12:00450 w/m2
13:00441 w/m2
14:00396 w/m2
15:00303 w/m2
16:00194 w/m2
17:0047 w/m2
Friday, February 28
Total: 4029 wh/m2Hours07:0031 w/m2
08:00185 w/m2
09:00333 w/m2
10:00469 w/m2
11:00569 w/m2
12:00613 w/m2
13:00602 w/m2
14:00531 w/m2
15:00405 w/m2
16:00235 w/m2
17:0056 w/m2
Saturday, March 1
Total: 4263 wh/m2Hours07:0037 w/m2
08:00208 w/m2
09:00379 w/m2
10:00516 w/m2
11:00607 w/m2
12:00642 w/m2
13:00621 w/m2
14:00542 w/m2
15:00411 w/m2
16:00241 w/m2
17:0059 w/m2
Sunday, March 2
Total: 4436 wh/m2Hours07:0043 w/m2
08:00224 w/m2
09:00401 w/m2
10:00542 w/m2
11:00633 w/m2
12:00666 w/m2
13:00640 w/m2
14:00556 w/m2
15:00421 w/m2
16:00247 w/m2
17:0063 w/m2
Monday, March 3
Total: 4281 wh/m2Hours07:0045 w/m2
08:00221 w/m2
09:00390 w/m2
10:00523 w/m2
11:00607 w/m2
12:00636 w/m2
13:00614 w/m2
14:00534 w/m2
15:00407 w/m2
16:00241 w/m2
17:0063 w/m2
Tuesday, March 4
Total: 2875 wh/m2Hours07:0032 w/m2
08:00145 w/m2
09:00255 w/m2
10:00351 w/m2
11:00408 w/m2
12:00429 w/m2
13:00412 w/m2
14:00359 w/m2
15:00273 w/m2
16:00166 w/m2
17:0045 w/m2
Wednesday, March 5
Total: 3141 wh/m2Hours07:0032 w/m2
08:00145 w/m2
09:00259 w/m2
10:00354 w/m2
11:00431 w/m2
12:00472 w/m2
13:00462 w/m2
14:00410 w/m2
15:00318 w/m2
16:00200 w/m2
17:0058 w/m2
Thursday, March 6
Total: 4524 wh/m2Hours07:0058 w/m2
08:00241 w/m2
09:00415 w/m2
10:00552 w/m2
11:00638 w/m2
12:00670 w/m2
13:00642 w/m2
14:00557 w/m2
15:00424 w/m2
16:00254 w/m2
17:0073 w/m2
Friday, March 7
Total: 4262 wh/m2Hours07:0058 w/m2
08:00227 w/m2
09:00388 w/m2
10:00515 w/m2
11:00596 w/m2
12:00625 w/m2
13:00600 w/m2
14:00527 w/m2
15:00406 w/m2
16:00247 w/m2
17:0073 w/m2
Saturday, March 8
Total: 4687 wh/m2Hours07:0068 w/m2
08:00253 w/m2
09:00428 w/m2
10:00566 w/m2
11:00656 w/m2
12:00687 w/m2
13:00660 w/m2
14:00576 w/m2
15:00442 w/m2
16:00269 w/m2
17:0082 w/m2
Sunday, March 9
Total: 4281 wh/m2Hours08:0071 w/m2
09:00254 w/m2
10:00424 w/m2
11:00540 w/m2
12:00592 w/m2
13:00575 w/m2
14:00570 w/m2
15:00507 w/m2
16:00400 w/m2
17:00263 w/m2
18:0085 w/m2
Monday, March 10
Total: 1217 wh/m2Hours08:0020 w/m2
09:0067 w/m2
10:00112 w/m2
11:00147 w/m2
12:00169 w/m2
13:00177 w/m2
14:00170 w/m2
15:00149 w/m2
16:00114 w/m2
17:0070 w/m2
18:0022 w/m2
Tuesday, March 11
Total: 1229 wh/m2Hours08:0021 w/m2
09:0069 w/m2
10:00113 w/m2
11:00148 w/m2
12:00170 w/m2
13:00178 w/m2
14:00171 w/m2
15:00150 w/m2
16:00115 w/m2
17:0071 w/m2
18:0023 w/m2
Wednesday, March 12
Total: 4624 wh/m2Hours08:0038 w/m2
09:00164 w/m2
10:00329 w/m2
11:00553 w/m2
12:00682 w/m2
13:00718 w/m2
14:00690 w/m2
15:00603 w/m2
16:00466 w/m2
17:00288 w/m2
18:0093 w/m2
To carry out the solar radiation forecast, the angle of incidence of solar radiation is taken into account, which depends, among others, on the declination, latitude, inclination and hour angle. The weather forecast is also taken into account, since, for example, on a cloudy day we would only have diffuse radiation, much less than direct radiation.
