Solar radiation in Viana do Castelo 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, September 19
Total: 4586 wh/m2Hours08:0048 w/m2
09:00228 w/m2
10:00388 w/m2
11:00477 w/m2
12:00462 w/m2
13:00441 w/m2
14:00641 w/m2
15:00636 w/m2
16:00572 w/m2
17:00419 w/m2
18:00230 w/m2
19:0044 w/m2
Tomorrow, September 20
Total: 4160 wh/m2Hours08:0036 w/m2
09:00186 w/m2
10:00377 w/m2
11:00508 w/m2
12:00514 w/m2
13:00486 w/m2
14:00425 w/m2
15:00484 w/m2
16:00501 w/m2
17:00400 w/m2
18:00207 w/m2
19:0036 w/m2
Saturday, September 21
Total: 3960 wh/m2Hours08:0031 w/m2
09:00157 w/m2
10:00307 w/m2
11:00442 w/m2
12:00535 w/m2
13:00579 w/m2
14:00560 w/m2
15:00498 w/m2
16:00393 w/m2
17:00282 w/m2
18:00151 w/m2
19:0025 w/m2
Sunday, September 22
Total: 4599 wh/m2Hours08:0027 w/m2
09:00152 w/m2
10:00294 w/m2
11:00439 w/m2
12:00566 w/m2
13:00648 w/m2
14:00670 w/m2
15:00629 w/m2
16:00532 w/m2
17:00397 w/m2
18:00213 w/m2
19:0032 w/m2
Monday, September 23
Total: 2907 wh/m2Hours08:0040 w/m2
09:00175 w/m2
10:00124 w/m2
11:00304 w/m2
12:00489 w/m2
13:00615 w/m2
14:00517 w/m2
15:00346 w/m2
16:00139 w/m2
17:0099 w/m2
18:0052 w/m2
19:007 w/m2
Tuesday, September 24
Total: 2274 wh/m2Hours08:0013 w/m2
09:0067 w/m2
10:00123 w/m2
11:00234 w/m2
12:00360 w/m2
13:00453 w/m2
14:00389 w/m2
15:00290 w/m2
16:00166 w/m2
17:00117 w/m2
18:0056 w/m2
19:006 w/m2
Wednesday, September 25
Total: 1313 wh/m2Hours08:009 w/m2
09:0055 w/m2
10:00102 w/m2
11:00141 w/m2
12:00168 w/m2
13:00182 w/m2
14:00181 w/m2
15:00166 w/m2
16:00137 w/m2
17:00106 w/m2
18:0059 w/m2
19:007 w/m2
Thursday, September 26
Total: 1319 wh/m2Hours08:0010 w/m2
09:0059 w/m2
10:00101 w/m2
11:00140 w/m2
12:00167 w/m2
13:00181 w/m2
14:00180 w/m2
15:00164 w/m2
16:00149 w/m2
17:00105 w/m2
18:0057 w/m2
19:006 w/m2
Friday, September 27
Total: 5038 wh/m2Hours08:0033 w/m2
09:00212 w/m2
10:00394 w/m2
11:00553 w/m2
12:00664 w/m2
13:00719 w/m2
14:00715 w/m2
15:00653 w/m2
16:00536 w/m2
17:00373 w/m2
18:00174 w/m2
19:0012 w/m2
Saturday, September 28
Total: 2738 wh/m2Hours08:0021 w/m2
09:00115 w/m2
10:00146 w/m2
11:00178 w/m2
12:00198 w/m2
13:00179 w/m2
14:00439 w/m2
15:00535 w/m2
16:00500 w/m2
17:00309 w/m2
18:00114 w/m2
19:004 w/m2
Sunday, September 29
Total: 4962 wh/m2Hours08:0028 w/m2
09:00206 w/m2
10:00392 w/m2
11:00547 w/m2
12:00656 w/m2
13:00710 w/m2
14:00706 w/m2
15:00642 w/m2
16:00525 w/m2
17:00364 w/m2
18:00175 w/m2
19:0011 w/m2
Monday, September 30
Total: 4836 wh/m2Hours08:0026 w/m2
09:00201 w/m2
10:00383 w/m2
11:00539 w/m2
12:00649 w/m2
13:00704 w/m2
14:00694 w/m2
15:00621 w/m2
16:00492 w/m2
17:00350 w/m2
18:00168 w/m2
19:009 w/m2
Tuesday, October 1
Total: 1674 wh/m2Hours08:0013 w/m2
09:00102 w/m2
10:00183 w/m2
11:00235 w/m2
12:00254 w/m2
13:00227 w/m2
14:00209 w/m2
15:00174 w/m2
16:00129 w/m2
17:0097 w/m2
18:0049 w/m2
19:002 w/m2
Wednesday, October 2
Total: 4449 wh/m2Hours08:0022 w/m2
09:00195 w/m2
10:00381 w/m2
11:00535 w/m2
12:00643 w/m2
13:00696 w/m2
14:00676 w/m2
15:00553 w/m2
16:00323 w/m2
17:00277 w/m2
18:00143 w/m2
19:005 w/m2
Thursday, October 3
Total: 3137 wh/m2Hours08:0020 w/m2
09:00192 w/m2
10:00377 w/m2
11:00531 w/m2
12:00639 w/m2
13:00692 w/m2
14:00686 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.