Solar radiation in Grahamstown 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, April 23
Total: 1244 wh/m2Hours07:003 w/m2
08:0045 w/m2
09:0093 w/m2
10:00132 w/m2
11:00174 w/m2
12:00169 w/m2
13:00164 w/m2
14:00144 w/m2
15:00110 w/m2
16:00178 w/m2
17:0032 w/m2
Tomorrow, April 24
Total: 2235 wh/m2Hours07:003 w/m2
08:0090 w/m2
09:00144 w/m2
10:00131 w/m2
11:00157 w/m2
12:00218 w/m2
13:00404 w/m2
14:00456 w/m2
15:00394 w/m2
16:00199 w/m2
17:0039 w/m2
Friday, April 25
Total: 3624 wh/m2Hours07:003 w/m2
08:00124 w/m2
09:00307 w/m2
10:00404 w/m2
11:00580 w/m2
12:00640 w/m2
13:00558 w/m2
14:00359 w/m2
15:00347 w/m2
16:00246 w/m2
17:0056 w/m2
Saturday, April 26
Total: 4241 wh/m2Hours07:006 w/m2
08:00163 w/m2
09:00347 w/m2
10:00515 w/m2
11:00620 w/m2
12:00663 w/m2
13:00644 w/m2
14:00562 w/m2
15:00424 w/m2
16:00244 w/m2
17:0053 w/m2
Sunday, April 27
Total: 3775 wh/m2Hours07:006 w/m2
08:00167 w/m2
09:00356 w/m2
10:00511 w/m2
11:00615 w/m2
12:00644 w/m2
13:00545 w/m2
14:00287 w/m2
15:00358 w/m2
16:00235 w/m2
17:0051 w/m2
Monday, April 28
Total: 4031 wh/m2Hours07:005 w/m2
08:00163 w/m2
09:00349 w/m2
10:00497 w/m2
11:00587 w/m2
12:00636 w/m2
13:00622 w/m2
14:00545 w/m2
15:00393 w/m2
16:00201 w/m2
17:0033 w/m2
Tuesday, April 29
Total: 3990 wh/m2Hours07:004 w/m2
08:00161 w/m2
09:00348 w/m2
10:00491 w/m2
11:00554 w/m2
12:00610 w/m2
13:00603 w/m2
14:00534 w/m2
15:00408 w/m2
16:00232 w/m2
17:0045 w/m2
Wednesday, April 30
Total: 3461 wh/m2Hours07:004 w/m2
08:00148 w/m2
09:00331 w/m2
10:00486 w/m2
11:00593 w/m2
12:00606 w/m2
13:00528 w/m2
14:00368 w/m2
15:00252 w/m2
16:00126 w/m2
17:0019 w/m2
Thursday, May 1
Total: 1353 wh/m2Hours07:001 w/m2
08:0039 w/m2
09:0086 w/m2
10:00124 w/m2
11:00150 w/m2
12:00192 w/m2
13:00216 w/m2
14:00200 w/m2
15:00192 w/m2
16:00128 w/m2
17:0025 w/m2
Friday, May 2
Total: 1448 wh/m2Hours07:001 w/m2
08:0042 w/m2
09:0093 w/m2
10:00135 w/m2
11:00164 w/m2
12:00175 w/m2
13:00170 w/m2
14:00147 w/m2
15:00281 w/m2
16:00203 w/m2
17:0037 w/m2
Saturday, May 3
Total: 2153 wh/m2Hours07:001 w/m2
08:0037 w/m2
09:00146 w/m2
10:00286 w/m2
11:00416 w/m2
12:00391 w/m2
13:00326 w/m2
14:00231 w/m2
15:00188 w/m2
16:00112 w/m2
17:0019 w/m2
Sunday, May 4
Total: 1131 wh/m2Hours07:001 w/m2
08:0037 w/m2
09:0092 w/m2
10:00133 w/m2
11:00176 w/m2
12:00188 w/m2
13:00167 w/m2
14:00145 w/m2
15:00117 w/m2
16:0064 w/m2
17:0011 w/m2
Monday, May 5
Total: 3916 wh/m2Hours07:002 w/m2
08:00144 w/m2
09:00329 w/m2
10:00481 w/m2
11:00582 w/m2
12:00624 w/m2
13:00604 w/m2
14:00522 w/m2
15:00387 w/m2
16:00210 w/m2
17:0031 w/m2
Tuesday, May 6
Total: 3460 wh/m2Hours07:001 w/m2
08:00142 w/m2
09:00326 w/m2
10:00477 w/m2
11:00578 w/m2
12:00606 w/m2
13:00511 w/m2
14:00257 w/m2
15:00330 w/m2
16:00203 w/m2
17:0029 w/m2
Wednesday, May 7
Total: 2931 wh/m2Hours07:001 w/m2
08:00138 w/m2
09:00318 w/m2
10:00462 w/m2
11:00552 w/m2
12:00544 w/m2
13:00435 w/m2
14:00245 w/m2
15:00157 w/m2
16:0071 w/m2
17:008 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.
