LOCAL CLIMATOLOGICAL DATA
Hourly Summary
December 18, 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| 29.8 | 28.9 | 29.3 | 25|  83| 0.00| 30.13| 30.10|30.114| 0.6| 13|  7|NNE|  3| 16|    0 |
|01| 29.6 | 29.0 | 29.4 | 25|  82| 0.00| 30.15| 30.13|30.139| 1.0|  0|  6| NW|  3|  1|    0 |
|02| 29.5 | 28.3 | 29.2 | 24|  82| 0.00| 30.16| 30.15|30.151| 0.7| 27|  7|  E|  3| 45|    0 |
|03| 28.4 | 23.5 | 25.6 | 22|  85| 0.00| 30.15| 30.14|30.146| 0.0| 78|  0|  E|  0| 45|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 24.0 | 21.7 | 22.9 | 20|  88| 0.00| 30.16| 30.14|30.145| 0.0| 78|  4|ENE|  1| 78|    0 |
|05| 22.2 | 21.0*| 21.7 | 19|  89| 0.00| 30.18| 30.16|30.167| 0.1|103|  3|ENE|  1|109|    0 |
|06| 26.1 | 21.3 | 23.4 | 21|  90| 0.00| 30.21| 30.18|30.196| 3.2|178| 14|SSE|  7|195|    0 |
|07| 26.7 | 25.6 | 26.2 | 23|  87| 0.00| 30.21| 30.20|30.206| 2.0|202|  9|  S|  5|195|    6 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 28.3 | 24.5 | 25.5 | 22|  87| 0.00| 30.21| 30.18|30.200| 0.8|194|  8|  S|  4|175|   36 |
|09| 33.9 | 28.3 | 32.1 | 26|  79| 0.00| 30.18| 30.16|30.175| 4.3|167| 16|  S|  8|162|  106 |
|10| 37.9 | 33.9 | 36.1 | 28|  71| 0.00| 30.17| 30.12|30.152| 5.8|173| 21|SSE| 10|170|  123 |
|11| 41.9 | 37.9 | 39.8 | 29|  65| 0.00| 30.12| 30.08|30.101| 5.4|175| 18|SSE|  9|163|  303 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 42.3 | 41.2 | 41.8 | 29|  59| 0.00| 30.08| 30.06|30.065| 7.4|181| 23|  S| 12|183|  348 |
|13| 41.7 | 40.2 | 40.7 | 27|  58| 0.00| 30.06| 30.02|30.035| 7.5|175| 24|SSE| 12|173|  146 |
|14| 42.7 | 41.5 | 41.9 | 26|  53| 0.00| 30.02| 29.99|30.004| 8.1|179| 25|  S| 13|177|   79 |
|15| 42.9 | 41.8 | 42.4 | 26|  52| 0.00| 29.99| 29.98|29.988| 6.8|191| 25|  S| 11|186|   43 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 42.4 | 41.6 | 42.0 | 27|  54| 0.00| 29.99| 29.98|29.983| 6.7|189| 25|SSE| 12|185|    2 |
|17| 43.5 | 41.9 | 42.5 | 26|  52| 0.00| 29.99| 29.98|29.985| 6.2|185| 23|SSE| 12|182|    0 |
|18| 43.9 | 43.4 | 43.7 | 26|  49| 0.00| 29.99| 29.98|29.983| 8.7|182| 25|SSE| 14|179|    0 |
|19| 44.0*| 43.4 | 43.7 | 26|  49| 0.00| 29.98| 29.97|29.973| 7.9|185| 23|  S| 13|187|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 43.6 | 43.1 | 43.3 | 27|  52| 0.00| 29.98| 29.93|29.956| 7.3|180| 22|  S| 10|179|    0 |
|21| 43.8 | 43.1 | 43.5 | 29|  57| 0.00| 29.93| 29.90|29.914| 7.9|186| 26|SSE| 12|180|    0 |
|22| 43.2 | 42.8 | 42.9 | 32|  65| 0.00| 29.90| 29.85|29.871| 9.7|181| 34|SSE| 15|176|    0 |
|23| 42.9 | 42.1 | 42.4 | 33|  68| 0.00| 29.86| 29.82|29.841| 6.0|187| 20|  S| 12|188|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.00| 30.21| 29.82|30.062| 4.7|182| 34|SSE| 15|176| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     32.5    | 35.5 | 26|69.0| 1.37|   7  |  23  | ---- | -- | - |   22  |   22  |  49.7|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat  32|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                0.0 | of Snow, Ice Pellets or Ice     5 |  .........  | 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.