Tucson : 2025 Heat Units DOY = Day Of Year (1 to 365) Max = Maximum Air Temperature Min = Minimum Air Temperature HU = Daily Heat Units CUM = Accumulated Heat Units : Since Jan 1, 2025 * = Missing data. Max, Min Temps and Heat Units Estimated. Temperature and Heat Units are in Fahrenheit Units Heat Units calculated by Single Sine Method 86/55 86/50 86/45 94/55 RH ========== ========== ========== ========== =========== DOY Date Max Min HU CUM HU CUM HU CUM HU CUM Max Min Ave --- ------ --- --- ---- ---- ---- ---- ---- ---- ---- ---- --- --- --- 1 Jan 1 76 32 6.3 6 9.0 9 11.8 12 6.3 6 56 6 31 2 Jan 2 77 32 7.0 13 9.6 19 12.6 24 7.0 13 47 7 25 3 Jan 3 87 35 11.4 25 14.2 33 17.7 42 11.5 25 47 5 24 4 Jan 4 77 40 7.4 32 10.5 43 14.0 56 7.4 32 38 8 21 5 Jan 5 69 35 4.0 36 6.5 50 9.6 66 4.0 36 49 15 31 6 Jan 6 72 32 4.8 41 7.4 57 10.1 76 4.8 41 57 10 30 7 Jan 7 72 39 5.4 46 8.4 66 11.6 87 5.4 46 41 11 25 8 Jan 8 59 39 0.6 47 2.5 68 5.2 93 0.6 47 66 17 33 9 Jan 9 55 31 0.0 47 0.9 69 2.8 95 0.0 47 71 22 45 10 Jan 10 60 30 0.7 48 2.4 71 4.7 100 0.7 48 70 19 40 11 Jan 11 61 28 1.2 49 3.0 74 5.1 105 1.2 49 66 7 31 12 Jan 12 62 25 1.5 50 3.1 78 5.4 111 1.5 50 46 9 24 13 Jan 13 61 25 1.0 51 2.6 80 4.6 115 1.0 51 46 11 27 14 Jan 14 62 23 1.3 53 3.0 83 5.0 120 1.3 53 53 9 29 15 Jan 15 75 26 5.5 58 8.0 91 10.6 131 5.5 58 51 14 29 16 Jan 16 75 37 6.6 65 9.4 101 12.6 143 6.6 65 55 16 33 17 Jan 17 65 38 2.7 67 5.0 106 8.0 151 2.7 68 45 15 28 18 Jan 18 64 31 1.9 69 3.9 109 6.3 158 1.9 69 57 16 36 19 Jan 19 67 28 2.9 72 5.1 115 7.6 165 2.9 72 57 5 31 20 Jan 20 63 28 1.7 74 3.5 118 5.8 171 1.7 74 47 11 24 21 Jan 21 63 29 1.6 76 3.5 122 5.8 177 1.6 76 31 4 14 22 Jan 22 62 23 1.3 77 3.0 125 5.0 182 1.3 77 38 5 18 23 Jan 23 69 23 3.5 80 5.6 130 8.0 190 3.5 80 47 3 15 24 Jan 24 73 32 5.4 86 7.9 138 10.7 201 5.4 86 25 2 9 25 Jan 25 76 41 7.2 93 10.4 148 13.9 215 7.2 93 23 4 11 26 Jan 26 74 42 6.5 99 9.7 158 13.1 228 6.5 100 35 6 17 27 Jan 27 63 33 1.8 101 3.8 162 6.2 234 1.8 101 78 24 37 28 Jan 28 60 37 1.1 102 3.0 165 5.7 240 1.1 102 73 33 57 29 Jan 29 54 33 0.0 102 0.8 166 2.8 242 0.0 102 93 35 72 30 Jan 30 58 33 0.5 103 2.0 168 4.2 247 0.5 103 96 33 68 31 Jan 31 68 30 3.4 106 5.6 173 8.2 255 3.4 106 90 20 57 32 Feb 1 76 33 6.4 113 9.0 182 12.1 267 6.4 113 81 10 43 33 Feb 2 80 37 8.5 121 11.5 194 14.9 282 8.5 121 59 10 35 34 Feb 3 89 41 12.8 134 16.0 210 19.9 302 13.0 134 66 9 35 35 Feb 4 88 44 13.4 147 16.9 227 20.9 323 13.7 148 47 2 20 36 Feb 5 84 38 10.5 158 13.6 240 17.1 340 10.5 158 36 5 19 37 Feb 6 86 38 11.6 169 14.7 255 18.1 358 11.6 170 45 4 22 38 Feb 7 80 38 8.7 178 11.7 267 15.2 373 8.7 179 45 8 26 39 Feb 8 79 39 8.6 187 11.5 278 15.1 388 8.6 187 49 14 30 40 Feb 9 82 41 9.9 197 13.1 291 16.6 405 9.9 197 61 9 32 41 Feb 10 78 50 10.1 207 14.3 306 19.3 424 10.1 207 41 11 25 42 Feb 11 73 50 7.6 214 11.7 317 16.7 441 7.6 215 48 7 28 43 Feb 12 64 45 2.9 217 5.8 323 9.7 450 2.9 218 63 21 42 44 Feb 13 78 40 8.1 225 11.1 334 14.6 465 8.1 226 68 19 41 45 Feb 14 75 52 8.8 234 13.2 347 18.2 483 8.8 235 78 23 41 46 Feb 15 66 41 3.2 237 5.7 353 9.0 492 3.2 238 82 20 45 47 Feb 16 78 36 7.8 245 10.7 364 14.0 506 7.8 246 73 10 37 48 Feb 17 80 41 9.3 254 12.6 376 16.3 522 9.3 255 58 9 28 49 Feb 18 76 45 7.8 262 11.2 388 15.3 538 7.8 263 42 10 24 50 Feb 19 80 38 8.7 271 11.7 399 15.1 553 8.7 272 53 6 26 51 Feb 20 77 41 7.8 279 10.9 410 14.5 567 7.8 279 46 8 22 52 Feb 21 80 41 9.3 288 12.3 423 16.0 583 9.3 289 43 7 22 53 Feb 22 75 38 6.4 294 9.3 432 12.6 596 6.4 295 46 10 23 54 Feb 23 79 36 8.2 303 11.0 443 14.3 610 8.2 303 49 7 23 55 Feb 24 84 39 10.7 313 13.8 457 17.4 628 10.7 314 40 6 20 56 Feb 25 86 42 12.0 325 15.2 472 19.3 647 12.0 326 36 8 20 57 Feb 26 86 45 12.6 338 16.1 488 20.6 668 12.6 339 38 9 22 58 Feb 27 82 42 10.5 348 13.7 502 17.4 685 10.5 349 51 5 20 59 Feb 28 80 39 8.9 357 11.9 514 15.3 700 8.9 358 31 5 16 60 Mar 1 84 44 11.4 369 14.7 528 18.9 719 11.4 369 48 5 20 61 Mar 2 79 45 9.4 378 12.9 541 16.9 736 9.4 379 62 11 31 62 Mar 3 64 45 2.9 381 5.8 547 9.7 746 2.9 382 44 19 28 63 Mar 4 68 37 3.7 385 6.2 553 9.2 755 3.7 385 59 19 36 64 Mar 5 81 38 9.1 394 12.2 565 15.7 771 9.1 394 55 5 26 65 Mar 6 71 53 7.4 401 12.2 578 17.2 788 7.4 402 34 17 24 66 Mar 7 56 43 0.1 401 1.9 579 5.0 793 0.1 402 91 27 51 67 Mar 8 64 44 2.5 404 5.2 585 8.8 802 2.5 404 92 22 56 68 Mar 9 81 36 8.8 413 11.7 596 15.0 817 8.8 413 84 7 39 69 Mar 10 86 42 12.3 425 15.5 612 19.7 836 12.3 426 41 4 18 70 Mar 11 78 46 9.0 434 12.3 624 16.6 853 9.0 435 45 5 20 71 Mar 12 77 51 9.5 443 14.0 638 19.0 872 9.5 444 93 25 60 72 Mar 13 75 46 7.5 451 11.0 649 15.4 887 7.5 452 93 16 59 73 Mar 14 55 41 0.0 451 1.3 650 3.9 891 0.0 452 75 31 54 74 Mar 15 62 45 2.1 453 4.8 655 8.8 900 2.1 454 88 27 55 75 Mar 16 78 38 7.8 461 10.9 666 14.2 914 7.8 461 83 13 43 76 Mar 17 88 44 13.3 474 16.7 683 21.0 935 13.4 475 75 6 34 77 Mar 18 66 46 3.8 478 6.9 690 11.0 946 3.8 479 47 10 27 78 Mar 19 72 37 5.2 483 7.8 698 11.0 957 5.2 484 59 6 26 79 Mar 20 84 35 10.0 493 13.1 711 16.4 974 10.0 494 50 3 19 80 Mar 21 83 41 10.4 504 13.6 724 17.3 991 10.4 504 38 4 17 81 Mar 22 86 44 12.7 516 16.3 741 20.6 1012 12.8 517 38 6 19 82 Mar 23 86 48 13.4 530 17.3 758 21.9 1033 13.5 531 43 8 21 83 Mar 24 91 49 15.0 545 19.1 777 24.0 1057 15.7 546 46 10 22 84 Mar 25 99 51 17.5 562 21.8 799 26.8 1084 19.6 566 46 3 18 85 Mar 26 93 64 21.9 584 26.9 826 31.9 1116 23.3 589 30 6 16 86 Mar 27 90 55 17.0 601 22.0 848 27.0 1143 17.5 607 46 9 22 87 Mar 28 87 54 15.7 617 20.6 868 25.6 1169 15.8 622 41 8 20 88 Mar 29 81 55 12.8 630 17.8 886 22.8 1192 12.8 635 37 7 19 89 Mar 30 80 46 9.8 639 13.4 899 17.9 1209 9.8 645 46 7 20 90 Mar 31 81 50 11.2 651 15.3 915 20.3 1230 11.2 656 48 13 28 91 Apr 1 77 52 9.8 660 14.2 929 19.2 1249 9.8 666 70 6 33 92 Apr 2 68 49 4.9 665 8.4 937 13.2 1262 4.9 671 50 11 26 93 Apr 3 68 41 4.2 669 6.9 944 10.3 1272 4.2 675 50 13 30 94 Apr 4 67 47 4.2 674 7.4 952 12.0 1284 4.2 679 57 22 38 95 Apr 5 70 40 4.9 679 7.6 959 11.0 1295 4.9 684 66 19 39 96 Apr 6 76 43 7.6 686 10.8 970 14.5 1310 7.6 692 70 7 32 97 Apr 7 84 45 11.7 698 15.3 985 19.2 1329 11.7 704 43 7 20 98 Apr 8 93 45 14.8 713 18.4 1004 22.9 1352 16.0 720 41 3 16 99 Apr 9 94 50 16.3 729 20.5 1024 25.5 1378 17.7 737 30 4 14 100 Apr 10 97 50 17.0 746 21.4 1046 26.4 1404 19.0 756 33 3 14 101 Apr 11 100 52 17.8 764 22.6 1068 27.6 1432 20.2 776 31 3 13 102 Apr 12 98 53 17.9 782 22.8 1091 27.8 1459 20.2 797 33 2 13 103 Apr 13 94 60 20.0 802 25.0 1116 30.0 1489 21.5 818 25 6 11 104 Apr 14 92 61 20.3 822 25.3 1141 30.3 1520 21.5 840 32 8 16 105 Apr 15 94 56 18.3 840 23.3 1165 28.3 1548 19.7 859 53 12 27 106 Apr 16 92 58 18.8 859 23.8 1188 28.8 1577 19.8 879 74 3 29 107 Apr 17 82 56 14.0 873 19.0 1207 24.0 1601 14.0 893 43 8 25 108 Apr 18 75 48 8.2 881 12.0 1219 16.7 1617 8.2 901 62 21 38 --- ------ --- --- ---- ---- ---- ---- ---- ---- ---- ---- --- --- --- DOY Date Max Min HU CUM HU CUM HU CUM HU CUM Max Min Ave ========== ========== ========== ========== =========== 86/55 86/50 86/45 94/55 RH Tucson