US Heating and Cooling Degree Days
United States monthly heating and cooling degree days and weather data.
| Indicator | 08-2026 | 07-2026 | 06-2026 | 05-2026 | 04-2026 | 03-2026 | 02-2026 | 01-2026 | 12-2025 | 11-2025 | 10-2025 | 09-2025 | 08-2025 | 07-2025 | 06-2025 | 05-2025 | 04-2025 | 03-2025 | 02-2025 | 01-2025 | 12-2024 | 11-2024 | 10-2024 | 09-2024 | 08-2024 | 07-2024 | 06-2024 | 05-2024 | 04-2024 | 03-2024 | 02-2024 | 01-2024 | 12-2023 | 11-2023 | 10-2023 | 09-2023 | 08-2023 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WEATHER-WEIGHTED ENERGY DEMAND (65°F BASE)2 | ||||||||||||||||||||||||||||||||||||||
| Heating Degree Days (HDD) | 7 | 3 | 24 | 142 | 242 | 407 | 661 | 886 | 757 | 470 | 218 | 39 | 10 | 4 | 20 | 138 | 284 | 476 | 695 | 954 | 711 | 434 | 188 | 37 | 9 | 4 | 19 | 114 | 284 | 494 | 580 | 847 | 628 | 509 | 207 | 45 | 9 | |
| Cooling Degree Days (CDD) | 376 | 391 | 258 | 114 | 62 | 57 | 12 | 9 | 13 | 23 | 76 | 198 | 304 | 388 | 274 | 123 | 54 | 29 | 15 | 4 | 11 | 30 | 93 | 206 | 338 | 388 | 289 | 153 | 44 | 29 | 11 | 8 | 9 | 18 | 70 | 200 | 346 | |
| TEMPERATURE AND PRECIPITATION4 | ||||||||||||||||||||||||||||||||||||||
| Average Temperature | 24.21 | 24.94 | 21.47 | 16.49 | 12.64 | 10.47 | 4.6 | 0.62 | 3.24 | 8.16 | 13.87 | 19.97 | 22.99 | 24.12 | 21.78 | 16.51 | 11.98 | 8.25 | 1.53 | -1.58 | 3.42 | 7.3 | 14.96 | 20.34 | 23.34 | 24.28 | 22.11 | 16.81 | 12 | 7.19 | 4.88 | -0.08 | 4.31 | 6.79 | 13.35 | 19.86 | 23.53 | |
| Average Maximum Temperature | 31.42 | 31.96 | 28.33 | 23.69 | 19.69 | 17.98 | 11.3 | 6.61 | 9.17 | 14.42 | 20.56 | 27.14 | 29.94 | 30.98 | 28.74 | 23.36 | 19.05 | 15.33 | 7.72 | 4.34 | 9.06 | 13.06 | 22.84 | 27.69 | 30.4 | 31.36 | 29.22 | 23.69 | 18.9 | 13.54 | 11.04 | 5 | 9.85 | 13.14 | 20.05 | 26.92 | 30.51 | |
| Average Minimum Temperature | 17 | 17.91 | 14.61 | 9.29 | 5.59 | 2.95 | -2.1 | -5.38 | -2.7 | 1.9 | 7.17 | 12.79 | 16.04 | 17.25 | 14.82 | 9.65 | 4.91 | 1.15 | -4.67 | -7.49 | -2.23 | 1.53 | 7.08 | 12.98 | 16.27 | 17.2 | 15.01 | 9.92 | 5.1 | 0.83 | -1.28 | -5.16 | -1.22 | 0.44 | 6.64 | 12.8 | 16.55 | |
| Total Precipitation | 58.42 | 64.52 | 83.06 | 74.17 | 69.09 | 46.99 | 35.56 | 39.62 | 51.82 | 43.94 | 59.18 | 49.28 | 59.18 | 77.98 | 84.07 | 93.47 | 72.9 | 61.21 | 55.12 | 34.8 | 60.45 | 77.22 | 24.38 | 58.42 | 62.48 | 78.49 | 70.1 | 92.46 | 71.63 | 73.15 | 52.07 | 82.8 | 65.79 | 35.31 | 55.37 | 54.1 | 70.61 | |
| Degree Days by 9 Census Regions (EIA)2 | ||||||||||||||||||||||||||||||||||||||
| Heating degree-days, United States9 | 5 | 24 | 139 | 239 | 402 | 653 | 876 | 748 | 464 | 215 | 40 | 11 | 4 | 20 | 136 | 280 | 470 | 687 | 946 | 704 | 430 | 186 | 37 | 9 | 4 | 20 | 114 | 281 | 489 | 576 | 841 | 624 | 505 | 207 | 46 | 10 | ||
| Heating degree-days, New England | 12 | 26 | 259 | 511 | 841 | 1,163 | 1,290 | 1,175 | 757 | 382 | 93 | 27 | 2 | 25 | 229 | 513 | 790 | 1,075 | 1,247 | 1,060 | 607 | 381 | 95 | 17 | 1 | 17 | 191 | 544 | 762 | 915 | 1,088 | 853 | 788 | 289 | 66 | 25 | ||
| Heating degree-days, Middle Atlantic | 3 | 18 | 212 | 376 | 704 | 1,075 | 1,242 | 1,106 | 687 | 339 | 56 | 16 | 0 | 10 | 191 | 423 | 673 | 973 | 1,216 | 999 | 552 | 306 | 62 | 8 | 1 | 9 | 128 | 431 | 671 | 832 | 1,022 | 790 | 715 | 273 | 57 | 13 | ||
| Heating degree-days, East North Central | 9 | 35 | 243 | 326 | 672 | 995 | 1,367 | 1,187 | 741 | 304 | 64 | 21 | 2 | 18 | 247 | 456 | 677 | 1,075 | 1,357 | 1,030 | 594 | 293 | 47 | 13 | 7 | 19 | 134 | 393 | 690 | 775 | 1,192 | 826 | 736 | 337 | 67 | 21 | ||
| Heating degree-days, West North Central | 3 | 38 | 199 | 379 | 664 | 877 | 1,355 | 1,179 | 704 | 271 | 67 | 24 | 9 | 34 | 200 | 436 | 668 | 1,197 | 1,405 | 1,083 | 699 | 268 | 54 | 22 | 12 | 35 | 164 | 398 | 738 | 760 | 1,341 | 903 | 744 | 360 | 58 | 17 | ||
| Heating degree-days, South Atlantic | 0 | 1 | 47 | 76 | 220 | 504 | 635 | 532 | 305 | 131 | 10 | 1 | 0 | 1 | 38 | 93 | 272 | 404 | 722 | 512 | 223 | 109 | 10 | 0 | 0 | 1 | 24 | 111 | 270 | 404 | 573 | 452 | 325 | 110 | 9 | 0 | ||
| Heating degree-days, East South Central | 0 | 1 | 58 | 77 | 247 | 563 | 828 | 674 | 394 | 141 | 12 | 0 | 0 | 0 | 58 | 118 | 348 | 547 | 941 | 632 | 273 | 132 | 11 | 0 | 0 | 0 | 28 | 139 | 358 | 450 | 853 | 598 | 415 | 146 | 14 | 0 | ||
| Heating degree-days, West South Central | 0 | 0 | 8 | 26 | 98 | 234 | 534 | 368 | 147 | 23 | 2 | 0 | 0 | 0 | 11 | 42 | 149 | 380 | 658 | 339 | 153 | 17 | 2 | 0 | 0 | 0 | 3 | 46 | 185 | 256 | 634 | 391 | 256 | 47 | 1 | 0 | ||
| Heating degree-days, Mountain | 5 | 64 | 196 | 368 | 355 | 547 | 800 | 643 | 483 | 311 | 88 | 17 | 11 | 56 | 205 | 394 | 557 | 680 | 1,007 | 730 | 681 | 229 | 73 | 17 | 10 | 46 | 257 | 393 | 643 | 678 | 926 | 775 | 579 | 320 | 99 | 19 | ||
| Heating degree-days, Pacific | 13 | 52 | 161 | 299 | 260 | 403 | 487 | 445 | 340 | 216 | 36 | 9 | 15 | 53 | 167 | 319 | 475 | 467 | 592 | 484 | 456 | 145 | 42 | 18 | 8 | 57 | 209 | 348 | 491 | 500 | 577 | 479 | 383 | 172 | 75 | 10 | ||
| Cooling degree-days, United States9 | 386 | 263 | 119 | 66 | 59 | 13 | 10 | 15 | 26 | 80 | 202 | 309 | 391 | 278 | 127 | 58 | 31 | 17 | 5 | 13 | 32 | 96 | 210 | 342 | 391 | 292 | 157 | 46 | 31 | 13 | 9 | 11 | 20 | 73 | 204 | 350 | ||
| Cooling degree-days, New England | 185 | 104 | 7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 39 | 117 | 273 | 111 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 35 | 155 | 283 | 129 | 18 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 57 | 134 | ||
| Cooling degree-days, Middle Atlantic | 284 | 152 | 20 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 85 | 157 | 350 | 169 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 7 | 70 | 214 | 328 | 190 | 50 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 83 | 192 | ||
| Cooling degree-days, East North Central | 304 | 150 | 38 | 11 | 5 | 0 | 0 | 0 | 0 | 15 | 95 | 184 | 327 | 213 | 36 | 1 | 3 | 0 | 0 | 0 | 0 | 15 | 113 | 223 | 234 | 206 | 102 | 3 | 3 | 0 | 0 | 0 | 0 | 10 | 89 | 188 | ||
| Cooling degree-days, West North Central | 374 | 202 | 64 | 22 | 14 | 1 | 0 | 0 | 0 | 32 | 137 | 236 | 337 | 220 | 53 | 7 | 11 | 0 | 0 | 0 | 0 | 31 | 143 | 252 | 279 | 234 | 87 | 10 | 7 | 4 | 0 | 0 | 0 | 14 | 148 | 280 | ||
| Cooling degree-days, South Atlantic | 490 | 378 | 229 | 123 | 96 | 20 | 28 | 47 | 51 | 135 | 285 | 382 | 519 | 399 | 242 | 126 | 59 | 59 | 17 | 36 | 85 | 147 | 308 | 437 | 503 | 400 | 272 | 90 | 82 | 29 | 35 | 38 | 65 | 138 | 291 | 462 | ||
| Cooling degree-days, East South Central | 458 | 316 | 140 | 90 | 63 | 6 | 4 | 2 | 8 | 72 | 253 | 361 | 498 | 357 | 152 | 65 | 31 | 7 | 1 | 3 | 27 | 79 | 250 | 411 | 444 | 356 | 219 | 46 | 28 | 10 | 2 | 3 | 4 | 65 | 247 | 419 | ||
| Cooling degree-days, West South Central | 588 | 509 | 267 | 189 | 153 | 48 | 14 | 20 | 86 | 246 | 415 | 566 | 566 | 490 | 303 | 168 | 107 | 19 | 6 | 29 | 91 | 264 | 402 | 631 | 553 | 527 | 373 | 152 | 81 | 37 | 8 | 16 | 28 | 171 | 509 | 710 | ||
| Cooling degree-days, Mountain | 424 | 308 | 133 | 59 | 81 | 14 | 3 | 3 | 19 | 76 | 217 | 386 | 394 | 293 | 125 | 42 | 14 | 9 | 0 | 2 | 3 | 123 | 253 | 382 | 446 | 339 | 113 | 35 | 6 | 2 | 0 | 0 | 13 | 86 | 203 | 363 | ||
| Cooling degree-days, Pacific | 253 | 126 | 47 | 21 | 54 | 10 | 12 | 13 | 16 | 39 | 158 | 264 | 187 | 131 | 54 | 20 | 11 | 8 | 7 | 8 | 10 | 86 | 167 | 237 | 330 | 144 | 36 | 14 | 8 | 6 | 7 | 8 | 14 | 55 | 94 | 244 |
Latest reading
Heating Degree Days (HDD) stood at 7 Degree days (°F) in Aug 2026. That is +133.3% from Jul 2026 and −30.0% from a year earlier. The series on this page is monthly and runs from Jan 1895 to Aug 2026. Source: NOAA NCEI (Climate at a Glance); EIA Monthly Energy Review.
- Latest
- 7 Degree days (°F)
- Aug 2026
- vs previous period
- +133.3%
- Jul 2026
- vs a year earlier
- −30.0%
About this data
United States monthly heating and cooling degree days and weather data. Published monthly by NOAA NCEI with records beginning in 1895, this dataset tracks weather-driven energy demand across nine census regions. It includes heating degree days, cooling degree days, temperature, and precipitation based on a 65°F baseline.
Frequently asked questions
- What are heating and cooling degree days in the United States?
- They are quantitative measures used to reflect the demand for energy needed to heat or cool buildings, calculated by how much the daily average temperature departs from a base temperature of 65°F.
- How frequently is the data updated and what is the historical coverage?
- The data is published monthly by NOAA NCEI, with continuous historical records dating back to 1895 for the contiguous United States.
- What geographic breakdowns are included for degree days?
- The dataset provides degree-day metrics for the entire United States as well as broken down across nine distinct EIA census regions.
- Why are degree days important for energy market analysis?
- They serve as the primary weather-driven indicator of residential and commercial electricity and natural gas consumption, helping analysts forecast utility demand and seasonal energy trends.
