| Coefficientsa | Model | Unstandardized coefficients | Standardized coefficients | t | Sig. | Collinearity statistics | B | Std. Error | Beta | Tolerance | VIF |
| Time-lag0 | (Constant) | −232365034.136 | 20514208.737 | — | −11.327 | 0.000 | — | — | Dry bulb temperatures | −1239414.048 | 75,319.865 | −0.667 | −16.455 | 0.000 | 0.021 | 47.057 | Dew point temperatures | −354626.266 | 79,919.948 | −0.214 | −4.437 | 0.000 | 0.015 | 66.370 | Relative humidity | 66,371.259 | 22,274.126 | 0.084 | 2.980 | 0.003 | 0.044 | 22.624 | Atmospheric station pressure | 2116.094 | 197.968 | 0.085 | 10.689 | 0.000 | 0.553 | 1.809 | Horizontal infrared radiation | 99,198.849 | 2813.952 | 1.642 | 35.252 | 0.000 | 0.016 | 62.031 | Global horizontal radiation | −3376.020 | 2404.186 | −0.043 | −1.404 | 0.160 | −0.038 | 26.628 | Direct normal radiation | 788.013 | 1296.095 | 0.011 | 0.608 | 0.543 | 0.109 | 9.146 | Diffuse radiation | 13,477.568 | 3084.249 | 0.084 | 4.370 | 0.000 | 0.095 | 10.484 | Wind speed | −479633.798 | 69,883.408 | −0.047 | −6.863 | 0.000 | 0.753 | 1.328 | Total sky cover | −6135755.540 | 164883.515 | −1.568 | −37.213 | 0.000 | 0.020 | 50.797 | Visibility | 408798.727 | 177884.682 | 0.017 | 2.298 | 0.022 | 0.669 | 1.495 |
| Time-lag1 | (Constant) | −242363953.699 | 20520409.598 | — | −11.811 | 0.000 | — | — | Dry bulb temperatures | −1289408.649 | 75,333.909 | −0.694 | −17.116 | 0.000 | 0.021 | 47.050 | Dew point temperatures | −155279.237 | 79,936.057 | −0.094 | −1.943 | 0.052 | 0.015 | 66.368 | Relative humidity | 16,763.249 | 22,278.700 | 0.021 | 0.752 | 0.452 | 0.044 | 22.625 | Atmospheric station pressure | 2277.502 | 198.032 | 0.091 | 11.501 | 0.000 | 0.553 | 1.809 | Horizontal infrared radiation | 87,070.308 | 2814.591 | 1.441 | 30.935 | 0.000 | 0.016 | 62.032 | Global horizontal radiation | −39853.596 | 2404.644 | −0.506 | −16.574 | 0.000 | 0.038 | 26.627 | Direct normal radiation | 25,968.009 | 1296.347 | 0.358 | 20.032 | 0.000 | 0.109 | 9.146 | Diffuse radiation | 54,012.154 | 3084.824 | 0.335 | 17.509 | 0.000 | 0.095 | 10.484 | Wind speed | −616322.819 | 69,904.642 | −0.060 | −8.817 | 0.000 | 0.753 | 1.328 | Total sky cover | −5285555.158 | 164922.949 | −1.351 | −32.049 | 0.000 | 0.020 | 50.800 | Visibility | 35,564.622 | 177925.734 | 0.001 | 0.200 | 0.842 | 0.669 | 1.495 |
| Time-lag2 | (Constant) | −242862773.124 | 19841671.213 | — | −12.240 | 0.000 | — | — | Dew point temperatures | 102726.330 | 77,287.300 | 0.062 | 1.329 | 0.184 | 0.015 | 66.365 | Relative humidity | −57775.571 | 21,540.586 | −0.073 | −2.682 | 0.007 | 0.044 | 22.625 | Atmospheric station pressure | 2360.095 | 191.484 | 0.095 | 12.325 | 0.000 | 0.553 | 1.810 | Horizontal infrared radiation | 76,361.042 | 2721.411 | 1.264 | 28.059 | 0.000 | 0.016 | 62.033 | Global horizontal radiation | −82461.104 | 2324.947 | −1.047 | −35.468 | 0.000 | 0.038 | 26.627 | Direct normal radiation | 56,837.692 | 1253.391 | 0.784 | 45.347 | 0.000 | 0.109 | 9.146 | Diffuse radiation | 101106.744 | 2982.570 | 0.628 | 33.899 | 0.000 | 0.095 | 10.484 | Total sky cover | −4510822.624 | 159465.297 | −1.153 | −28.287 | 0.000 | 0.020 | 50.803 | Dry bulb temperatures | −1387805.281 | 72,836.836 | −0.747 | −19.054 | 0.000 | 0.021 | 47.042 | Wind speed | −677958.805 | 67,588.517 | −0.066 | −10.031 | 0.000 | 0.753 | 1.328 | Visibility | −799488.056 | 172032.483 | −0.032 | −4.647 | 0.000 | 0.669 | 1.495 |
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