LOCAL CLIMATOLOGICAL DATA
Hourly Summary
December 13, 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| 18.6 | 14.3 | 16.1 | 12|  84| 0.00| 30.00| 29.99|29.997| 0.0|220|  0|WSW|  0|223|    0 |
|01| 16.8 | 13.1*| 14.3 | 11|  87| 0.00| 30.01| 30.00|30.003| 0.0|220|  2| SW|  1|220|    0 |
|02| 19.5 | 16.8 | 18.7 | 15|  87| 0.00| 30.01| 30.00|30.009| 0.0|211|  2|SSW|  0|211|    0 |
|03| 19.4 | 17.1 | 18.2 | 14|  84| 0.00| 30.00| 29.99|29.998| 0.5|190|  6|  S|  3|184|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 18.1 | 15.6 | 16.5 | 13|  86| 0.00| 29.99| 29.98|29.985| 1.1|183|  5|  S|  3|184|    0 |
|05| 21.6 | 18.1 | 20.1 | 16|  82| 0.00| 29.98| 29.97|29.971| 1.4|173|  8|SSE|  4|173|    0 |
|06| 22.7 | 21.6 | 22.3 | 17|  80| 0.00| 29.98| 29.97|29.972| 2.2|169| 10|SSE|  5|163|    0 |
|07| 23.4 | 22.7 | 23.0 | 18|  82| 0.00| 29.98| 29.95|29.963| 1.8|170| 11| SE|  6|168|    3 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 24.1 | 23.3 | 23.7 | 19|  82| 0.00| 29.95| 29.95|29.953| 1.6|180|  7|  S|  4|180|   36 |
|09| 26.9 | 23.9 | 25.5 | 20|  79| 0.00| 29.95| 29.94|29.948| 4.4|167| 15|SSE|  8|154|  120 |
|10| 27.4 | 26.6 | 27.0 | 20|  76| 0.00| 29.95| 29.92|29.936| 5.6|165| 15|  S|  9|174|  117 |
|11| 27.3 | 26.3 | 26.9 | 20|  74| 0.00| 29.92| 29.90|29.909| 7.0|170| 22|SSE| 11|170|   86 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 26.5 | 25.2 | 25.9 | 20|  78| 0.00| 29.90| 29.87|29.889| 6.6|169| 19|SSE| 10|171|   71 |
|13| 27.5*| 25.4 | 26.4 | 21|  81| 0.00| 29.87| 29.85|29.857| 5.3|169| 20|SSE|  9|164|  194 |
|14| 27.3 | 26.8 | 27.0 | 21|  77| 0.00| 29.85| 29.83|29.845| 6.3|172| 20|SSE| 11|175|   78 |
|15| 27.3 | 26.7 | 27.1 | 20|  75| 0.00| 29.86| 29.83|29.847| 6.9|176| 18|  S| 10|180|   23 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 26.8 | 26.1 | 26.5 | 21|  79| 0.00| 29.89| 29.86|29.874| 5.8|173| 20|  S| 10|163|    0 |
|17| 26.2 | 25.2 | 25.6 | 21|  81| 0.00| 29.89| 29.88|29.887| 5.8|169| 16|SSE|  9|171|    0 |
|18| 26.0 | 25.4 | 25.8 | 21|  82| 0.00| 29.91| 29.89|29.900| 3.7|174| 13|SSE|  7|177|    0 |
|19| 26.0 | 25.2 | 25.6 | 22|  86| 0.00| 29.92| 29.91|29.912| 4.8|178| 15|SSE|  8|176|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 25.5 | 25.2 | 25.3 | 22|  85| 0.00| 29.92| 29.91|29.913| 4.8|178| 16|SSE|  9|165|    0 |
|21| 25.3 | 24.9 | 25.2 | 21|  85| 0.00| 29.92| 29.91|29.917| 2.7|179| 12|SSE|  6|181|    0 |
|22| 25.6 | 24.7 | 25.2 | 21|  82| 0.00| 29.93| 29.91|29.923| 2.1|229| 10|WSW|  5|211|    0 |
|23| 25.6 | 25.0 | 25.2 | 19|  76| 0.00| 29.93| 29.92|29.929| 1.5|250|  9|  W|  5|246|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |  T  | 30.01| 29.83|29.931| 3.4|175| 22|SSE| 11|170| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     20.3    | 23.5 | 19|81.3| 1.27|   2  |  14  | ---- | -- | - |   11  |   11  |  30.3|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat  44|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                 T  | of Snow, Ice Pellets or Ice     8 |  .........  | 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.