Solar radiation in Portola Valley 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 24
Total: 3383 wh/m2Hours07:002 w/m2
08:00107 w/m2
09:00260 w/m2
10:00409 w/m2
11:00478 w/m2
12:00494 w/m2
13:00470 w/m2
14:00466 w/m2
15:00406 w/m2
16:00220 w/m2
17:0071 w/m2
Tomorrow, February 25
Total: 4598 wh/m2Hours07:005 w/m2
08:00165 w/m2
09:00361 w/m2
10:00525 w/m2
11:00639 w/m2
12:00694 w/m2
13:00685 w/m2
14:00614 w/m2
15:00486 w/m2
16:00311 w/m2
17:00113 w/m2
Wednesday, February 26
Total: 4637 wh/m2Hours07:007 w/m2
08:00170 w/m2
09:00366 w/m2
10:00530 w/m2
11:00644 w/m2
12:00698 w/m2
13:00688 w/m2
14:00617 w/m2
15:00488 w/m2
16:00313 w/m2
17:00116 w/m2
Thursday, February 27
Total: 4331 wh/m2Hours07:007 w/m2
08:00157 w/m2
09:00331 w/m2
10:00473 w/m2
11:00586 w/m2
12:00647 w/m2
13:00646 w/m2
14:00588 w/m2
15:00472 w/m2
16:00308 w/m2
17:00116 w/m2
Friday, February 28
Total: 4702 wh/m2Hours07:0010 w/m2
08:00177 w/m2
09:00371 w/m2
10:00534 w/m2
11:00647 w/m2
12:00703 w/m2
13:00694 w/m2
14:00624 w/m2
15:00497 w/m2
16:00322 w/m2
17:00123 w/m2
Saturday, March 1
Total: 4259 wh/m2Hours07:0011 w/m2
08:00171 w/m2
09:00354 w/m2
10:00508 w/m2
11:00603 w/m2
12:00645 w/m2
13:00623 w/m2
14:00545 w/m2
15:00426 w/m2
16:00268 w/m2
17:00105 w/m2
Sunday, March 2
Total: 4163 wh/m2Hours07:0011 w/m2
08:00154 w/m2
09:00318 w/m2
10:00457 w/m2
11:00562 w/m2
12:00614 w/m2
13:00617 w/m2
14:00559 w/m2
15:00452 w/m2
16:00298 w/m2
17:00121 w/m2
Monday, March 3
Total: 4564 wh/m2Hours07:0015 w/m2
08:00177 w/m2
09:00360 w/m2
10:00516 w/m2
11:00624 w/m2
12:00681 w/m2
13:00674 w/m2
14:00603 w/m2
15:00479 w/m2
16:00311 w/m2
17:00124 w/m2
Tuesday, March 4
Total: 4301 wh/m2Hours07:0016 w/m2
08:00172 w/m2
09:00347 w/m2
10:00501 w/m2
11:00597 w/m2
12:00639 w/m2
13:00625 w/m2
14:00557 w/m2
15:00441 w/m2
16:00288 w/m2
17:00118 w/m2
Wednesday, March 5
Total: 4489 wh/m2Hours07:0020 w/m2
08:00187 w/m2
09:00363 w/m2
10:00510 w/m2
11:00611 w/m2
12:00659 w/m2
13:00650 w/m2
14:00584 w/m2
15:00468 w/m2
16:00309 w/m2
17:00127 w/m2
18:001 w/m2
Thursday, March 6
Total: 4511 wh/m2Hours07:0022 w/m2
08:00190 w/m2
09:00368 w/m2
10:00518 w/m2
11:00616 w/m2
12:00664 w/m2
13:00649 w/m2
14:00584 w/m2
15:00464 w/m2
16:00306 w/m2
17:00129 w/m2
18:001 w/m2
Friday, March 7
Total: 1331 wh/m2Hours07:007 w/m2
08:0055 w/m2
09:00104 w/m2
10:00145 w/m2
11:00173 w/m2
12:00205 w/m2
13:00202 w/m2
14:00182 w/m2
15:00133 w/m2
16:0088 w/m2
17:0037 w/m2
Saturday, March 8
Total: 1292 wh/m2Hours07:008 w/m2
08:0056 w/m2
09:00106 w/m2
10:00146 w/m2
11:00175 w/m2
12:00188 w/m2
13:00185 w/m2
14:00167 w/m2
15:00134 w/m2
16:0089 w/m2
17:0038 w/m2
Sunday, March 9
Total: 2480 wh/m2Hours08:0032 w/m2
09:00199 w/m2
10:00354 w/m2
11:00459 w/m2
12:00457 w/m2
13:00360 w/m2
14:00186 w/m2
15:00168 w/m2
16:00135 w/m2
17:0090 w/m2
18:0039 w/m2
19:001 w/m2
Monday, March 10
Total: 1324 wh/m2Hours08:0011 w/m2
09:0065 w/m2
10:00108 w/m2
11:00149 w/m2
12:00177 w/m2
13:00190 w/m2
14:00187 w/m2
15:00169 w/m2
16:00136 w/m2
17:0091 w/m2
18:0040 w/m2
19:001 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.
