LOCAL CLIMATOLOGICAL DATA
Hourly Summary
December 19, 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| 43.2 | 42.4 | 42.8 | 35|  75| 0.00| 29.82| 29.77|29.796| 7.4|177| 23|SSE| 12|181|    0 |
|01| 43.1 | 42.2 | 42.8 | 37|  78| 0.00| 29.77| 29.72|29.749| 4.7|173| 20|SSW| 10|170|    0 |
|02| 42.6 | 41.3 | 41.7 | 36|  79| 0.00| 29.72| 29.66|29.692| 2.3|170|  9|SSE|  5|167|    0 |
|03| 44.6 | 42.5 | 43.1 | 37|  80| 0.00| 29.66| 29.59|29.652| 3.8|177| 15|  S|  7|178|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 47.9 | 44.5 | 46.2 | 42|  86| 0.00| 29.59| 29.53|29.564| 6.2|203| 23|  S|  0|  0|    0 |
|05| 50.2 | 47.9 | 48.9 | 45|  85| 0.00| 29.52| 29.45|29.483| 6.7|180| 21|  S|  0|  0|    0 |
|06| 50.6 | 49.7 | 50.2 | 44|  80| 0.00| 29.45| 29.41|29.433| 6.6|135| 24|  S|  0|  0|    0 |
|07| 51.0 | 49.6 | 50.4 | 45|  80| 0.00| 29.41| 29.35|29.379| 5.4|158| 19| SE|  0|  0|    2 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 52.4 | 51.9 | 52.2 | 46|  80| 0.00| 29.31| 29.26|29.285| 6.5|159| 25|  S| 10|149|   27 |
|09| 54.5 | 52.0 | 53.2 | 47|  79| 0.00| 29.26| 29.19|29.225| 7.4|165| 35|SSE| 14|160|   61 |
|10| 56.4*| 54.5 | 55.3 | 48|  77| 0.00| 29.19| 29.08|29.131| 7.7|150| 28|SSW| 12|146|   94 |
|11| 56.4 | 42.4 | 52.6 | 48|  83| 0.00| 29.18| 29.09|29.117| 8.5|198| 28|WSW| 18|252|   14 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 42.4 | 38.5 | 39.7 | 37|  89| 0.00| 29.18| 29.14|29.159|10.0|245| 25|WSW| 17|255|   27 |
|13| 38.5 | 35.3 | 36.9 | 34|  90| 0.00| 29.19| 29.17|29.182| 4.1|236| 16| SW|  9|237|   16 |
|14| 35.3 | 32.7 | 33.6 | 31|  90| 0.00| 29.19| 29.16|29.180| 0.8|195|  5|  S|  3|180|    6 |
|15| 35.1 | 32.7 | 34.1 | 32|  92| 0.00| 29.18| 29.17|29.175| 2.0|205|  9|SSW|  6|220|   24 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 35.0 | 34.3 | 34.6 | 33|  92| 0.00| 29.19| 29.17|29.185| 1.3|195| 14|SSW|  8|214|    1 |
|17| 35.9 | 34.6 | 35.3 | 32|  88| 0.00| 29.23| 29.19|29.214| 8.2|233| 27|  W| 14|248|    0 |
|18| 34.6 | 31.3 | 33.2 | 28|  82| 0.00| 29.31| 29.23|29.271|10.4|231| 26|WSW| 16|260|    0 |
|19| 31.4 | 30.3 | 30.9 | 25|  79| 0.00| 29.34| 29.30|29.326| 9.2|220| 28| SW| 14|225|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 30.7 | 30.1 | 30.3 | 25|  80| 0.00| 29.36| 29.34|29.352| 7.0|220| 26|  W| 13|239|    0 |
|21| 30.7 | 27.4 | 29.4 | 24|  80| 0.00| 29.43| 29.36|29.397| 9.0|226| 26|WSW| 18|238|    0 |
|22| 27.9 | 27.3 | 27.6 | 21|  75| 0.00| 29.49| 29.42|29.448|11.4|222| 34|WSW| 18|216|    0 |
|23| 27.3 | 26.5*| 26.9 | 19|  73| 0.00| 29.55| 29.49|29.523| 9.2|226| 24|SSW| 13|218|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.00| 29.82| 29.08|29.372| 6.5|201| 35|SSE| 18|252| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     41.5    | 40.5 | 35|82.3|  T  |   0  |  10  | ---- | -- | - |    9  |   11  |  11.4|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat  23|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                 T  | 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.