LOCAL CLIMATOLOGICAL DATA
Hourly Summary
December 21, 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| 33.0 | 32.7 | 32.9 | 21|  61| 0.00| 29.70| 29.67|29.692| 8.0|177| 23|SSE| 12|184|    0 |
|01| 33.4 | 32.8 | 33.1 | 22|  63| 0.00| 29.70| 29.67|29.688| 8.1|178| 21|  S| 11|178|    0 |
|02| 34.1*| 33.3 | 33.7 | 22|  63| 0.00| 29.70| 29.69|29.693| 7.8|179| 30|  S| 12|177|    0 |
|03| 34.1 | 33.4 | 33.7 | 22|  63| 0.00| 29.70| 29.69|29.691| 7.0|181| 24|SSE| 11|176|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 33.6 | 33.0 | 33.4 | 23|  65| 0.00| 29.69| 29.68|29.685| 7.0|177| 23|SSE| 10|177|    0 |
|05| 33.2 | 32.9 | 33.0 | 23|  67| 0.00| 29.68| 29.68|29.680| 6.6|176| 19|  S| 11|170|    0 |
|06| 33.2 | 32.8 | 33.0 | 24|  69| 0.00| 29.70| 29.68|29.691| 5.8|182| 17|  S| 11|180|    0 |
|07| 33.2 | 32.3 | 32.8 | 25|  72| 0.00| 29.75| 29.70|29.723| 6.6|199| 20| SW| 10|211|    2 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 34.1 | 31.7 | 32.9 | 22|  64| 0.00| 29.81| 29.75|29.778|12.3|236| 35| SW| 17|236|   22 |
|09| 31.7 | 28.4 | 29.7 | 16|  57| 0.00| 29.87| 29.81|29.849|11.7|248| 30|WSW| 17|250|   91 |
|10| 29.0 | 28.3 | 28.6 | 15|  55| 0.00| 29.92| 29.87|29.900|10.0|249| 27|  W| 15|263|  178 |
|11| 29.6 | 27.8 | 28.7 | 15|  56| 0.00| 29.93| 29.91|29.922|11.2|249| 34|WSW| 15|241|  250 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 27.9 | 27.2 | 27.5 | 15|  59| 0.00| 29.95| 29.93|29.942| 9.3|247| 26|WSW| 14|257|   95 |
|13| 27.3 | 26.3 | 26.7 | 16|  63| 0.00| 29.98| 29.95|29.963| 9.4|251| 24| SW| 13|273|   54 |
|14| 26.3 | 26.0 | 26.2 | 16|  65| 0.00| 30.01| 29.98|29.992| 9.3|249| 22|  W| 15|251|   29 |
|15| 26.2 | 25.9 | 26.1 | 16|  65| 0.00| 30.03| 30.01|30.016| 7.2|248| 18|WSW| 11|244|   17 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 26.0 | 24.8 | 25.5 | 17|  71| 0.00| 30.06| 30.03|30.048| 5.5|251| 16| SW| 10|253|    0 |
|17| 24.8 | 22.7 | 23.6 | 19|  83| 0.00| 30.09| 30.06|30.078| 5.2|270| 15|  W|  9|255|    0 |
|18| 23.1 | 22.7 | 22.9 | 17|  79| 0.00| 30.14| 30.09|30.114| 6.6|259| 18|WSW| 12|261|    0 |
|19| 23.0 | 20.6 | 21.8 | 14|  71| 0.00| 30.17| 30.14|30.154| 7.7|274| 22|WSW| 14|257|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 20.6 | 17.9 | 19.2 | 10|  68| 0.00| 30.20| 30.17|30.188| 7.2|277| 20|  W| 12|251|    0 |
|21| 17.9 | 14.9 | 16.3 |  9|  71| 0.00| 30.23| 30.20|30.214| 5.7|281| 18|  W| 10|284|    0 |
|22| 15.2 | 14.4 | 14.9 |  8|  74| 0.00| 30.27| 30.23|30.247| 3.3|284| 13|  W|  7|274|    0 |
|23| 14.4 | 12.5*| 13.6 |  6|  72| 0.00| 30.28| 30.26|30.274| 6.2|274| 19|  W| 10|280|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.00| 30.28| 29.67|29.926| 7.7|234| 35| SW| 17|236| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     23.3    | 27.1 | 17|66.5| 2.44|  23  |   0+ | ---- | -- | - |    8  |    8  |  30.8|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat  41|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                0.2 | 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.