LOCAL CLIMATOLOGICAL DATA
Hourly Summary
December 20, 2025

Station: Westford
Latitude: 44° 37' 38" N
Longitude: 73° 02' 30" W
Elevation (ground): 850 ft.
Time Zone: Eastern

+--+------------------------+----+-----+--------------------+------------------------+------+
|  |       Temperature      |    | Pre-|      Pressure      |           Wind         |Solar |
|  +------+------+------+---+ Hu-|cipi-|  Adj. to Sea Level +----+---+-------+-------+------+
|  |   M  |   M  |      |   |mid-| ta- +------+------+------+ Avg|Res| Peak  |2Minute| Mean |
|  |   a  |   i  |      | D | ity| tion|      |      |      |    |   +---+---+---+---+   W  |
|  |   x  |   n  |      | e |    |     |      |      |      |  S |   | S |   | S |   |   a  |
| H|   i  |   i  |   M  | w |  M |     |      |      |   M  |  p |   | p |   | p |   |   t  |
| o|   m  |   m  |   e  |   |  e |Water|   M  |   M  |   e  |  e | D | e | D | e | D |   t  |
| u|   u  |   u  |   a  | P |  a |     |   a  |   i  |   a  |  e | i | e | i | e | i |   s  |
| r|   m  |   m  |   n  | t |  n |Equiv|   x  |   n  |   n  |  d | r | d | r | d | r |  m²  |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
| 1|   2  |   3  |   4  | 5 |  6 |  7  |   8  |   9  |  10  | 11 | 12| 13| 14| 15| 16|  17  |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
|00| 26.7 | 23.8 | 26.0 | 19|  76| 0.00| 29.63| 29.54|29.581| 8.9|237| 23|SSW| 13|240|    0 |
|01| 23.8 | 21.6 | 22.9 | 18|  83| 0.00| 29.72| 29.63|29.676| 7.7|259| 20|  W| 11|245|    0 |
|02| 21.7 | 21.2 | 21.4 | 15|  75| 0.00| 29.79| 29.72|29.762| 9.7|262| 28|  W| 15|248|    0 |
|03| 21.4 | 20.0 | 20.6 | 13|  71| 0.00| 29.85| 29.79|29.815|10.0|259| 28|  W| 21|268|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 20.0 | 18.8 | 19.2 | 11|  70| 0.00| 29.94| 29.85|29.902| 7.8|267| 24|  W| 11|277|    0 |
|05| 18.9 | 18.0 | 18.4 | 11|  71| 0.00| 30.01| 29.94|29.973| 6.6|266| 22|  W| 11|273|    0 |
|06| 18.0 | 16.1 | 17.0 | 10|  74| 0.00| 30.04| 30.00|30.017| 3.0|263| 11|  W|  7|260|    0 |
|07| 16.1 | 14.6*| 15.1 |  9|  78| 0.00| 30.07| 30.04|30.056| 0.4|270|  7|  W|  3|270|    5 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 17.1 | 14.7 | 15.6 | 11|  80| 0.00| 30.09| 30.07|30.079| 0.6|244|  9|WSW|  5|241|   29 |
|09| 19.2 | 17.0 | 18.3 | 11|  73| 0.00| 30.09| 30.05|30.074| 2.9|247|  9|WSW|  6|241|  103 |
|10| 20.9 | 19.1 | 19.8 | 11|  69| 0.00| 30.08| 30.01|30.043| 1.8|241| 10|WSW|  6|240|  114 |
|11| 23.8 | 20.9 | 22.6 | 12|  64| 0.00| 30.05| 30.01|30.031| 2.8|219| 12|  S|  6|242|  264 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 24.4 | 23.6 | 24.0 | 14|  64| 0.00| 30.05| 30.01|30.030| 2.7|189| 10|SSE|  5|182|  199 |
|13| 24.9 | 24.3 | 24.6 | 15|  67| 0.00| 30.03| 30.01|30.022| 3.7|172| 11|  S|  7|170|  109 |
|14| 26.0 | 24.8 | 25.4 | 16|  67| 0.00| 30.04| 30.00|30.024| 2.0|183| 12|SSE|  5|191|   57 |
|15| 26.0 | 25.8 | 25.9 | 16|  66| 0.00| 30.04| 29.97|30.012| 1.8|166|  9|SSE|  5|172|   19 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 26.3 | 25.9 | 26.1 | 16|  64| 0.00| 29.97| 29.91|29.947| 3.3|154| 17|SSE|  9|147|    1 |
|17| 27.2 | 26.2 | 26.7 | 16|  63| 0.00| 29.91| 29.89|29.900| 6.2|164| 21|SSE| 10|163|    0 |
|18| 28.4 | 27.2 | 27.9 | 18|  65| 0.00| 29.89| 29.83|29.860| 8.0|165| 22|SSE| 12|169|    0 |
|19| 30.0 | 28.4 | 29.2 | 19|  65| 0.00| 29.83| 29.78|29.802| 8.4|169| 26| SE| 13|172|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 30.8 | 29.9 | 30.4 | 19|  62| 0.00| 29.79| 29.74|29.759|10.5|169| 28|SSE| 14|179|    0 |
|21| 31.8 | 30.6 | 31.2 | 19|  60| 0.00| 29.75| 29.72|29.733|11.0|175| 32|  S| 16|178|    0 |
|22| 32.5 | 31.7 | 32.1 | 20|  60| 0.00| 29.73| 29.72|29.722| 8.9|180| 29|  S| 13|184|    0 |
|23| 33.0*| 32.4 | 32.5 | 20|  61| 0.00| 29.72| 29.68|29.698| 8.6|172| 25|SSE| 13|170|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.00| 30.09| 29.54|29.897| 5.7|208| 32|  S| 21|268| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     23.8    | 23.9 | 15|68.6| 2.41|   8+ |   0  | ---- | -- | - |   21  |    3  |  37.5|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat  41|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                0.3 | of Snow, Ice Pellets or Ice     T |  .........  | Days |  Cool   0|
   +--------------------+-----------------------------------+-------------+------+----------+

  NOTES:
   Data in columns 4, 5, 6, 10, 11, 17 are means via continuous observations for each hour.
   Units: Temperature=°F, Wind=mph, Pressure=Inches Hg, Precipitation=inches.
   Column 5: Dew point is calculated from temperature and humidity and is continuously averaged for each hour.
   Column 12: Resultant wind is calculated by the vector sum of continuous wind observations.
   Precipitation types:
     1 FOG, 2 HEAVY FOG, 3 THUNDER, 4 ICE PELLETS, 5 HAIL, 6 GLAZE, 7 DUSTSTORM,
     8 SMOKE/HAZE, 9 BLOWING SNOW.
   Degree Days heating base is 65°F, cooling base is 65°F.