LOCAL CLIMATOLOGICAL DATA
Hourly Summary
September 10, 2026

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| 67.7 | 67.0 | 67.4 | 66|  96| 0.04| 29.69| 29.68|29.682| 3.1|196| 17| SW|  6|169|    0 |
|01| 67.7 | 67.2 | 67.6 | 66|  96| 0.00| 29.68| 29.67|29.676| 2.2|196| 12|SSE|  5|239|    0 |
|02| 67.6 | 66.7 | 67.2 | 66|  95| 0.00| 29.68| 29.67|29.678| 1.3|196|  9|SSE|  3|173|    0 |
|03| 66.7 | 64.6 | 65.9 | 64|  95| 0.00| 29.69| 29.68|29.687| 2.4|226| 14| SW|  5|236|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 64.7 | 63.4 | 64.0 | 62|  94| 0.00| 29.69| 29.69|29.690| 1.9|211| 10|SSE|  4|230|    0 |
|05| 63.7 | 63.5 | 63.6 | 62|  94| 0.00| 29.70| 29.69|29.693| 2.5|204| 13|SSE|  4|191|    0 |
|06| 64.3 | 63.6 | 63.8 | 62|  93| 0.00| 29.70| 29.69|29.694| 2.9|213| 11| SW|  5|231|    8 |
|07| 66.0 | 64.3 | 65.1 | 62|  91| 0.00| 29.70| 29.69|29.699| 2.8|218| 12|SSW|  5|222|   43 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 69.6 | 65.9 | 67.8 | 64|  86| 0.00| 29.71| 29.69|29.700| 4.6|236| 17|  S|  8|245|  200 |
|09| 71.2 | 69.6 | 70.3 | 63|  78| 0.00| 29.71| 29.70|29.704| 0.0|243|  8|  S|  5|242|  421 |
|10| 73.1 | 71.1 | 71.8 | 62|  72| 0.00| 29.72| 29.71|29.712| 0.0|240|  0|  S|  0|242|  542 |
|11| 74.0 | 72.1 | 73.1 | 62|  69| 0.00| 29.72| 29.71|29.719| 0.0|248|  0|  S|  0|242|  629 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 75.1 | 72.1 | 73.8 | 61|  65| 0.00| 29.72| 29.71|29.718| 3.4|253| 18|WSW| 10|260|  669 |
|13| 75.1 | 73.5 | 74.1 | 61|  63| 0.00| 29.73| 29.72|29.725| 5.5|258| 18|WSW| 10|252|  614 |
|14| 75.3*| 71.7 | 73.7 | 61|  64| 0.00| 29.72| 29.71|29.718| 4.4|258| 15|WSW|  9|247|  498 |
|15| 74.9 | 71.7 | 73.1 | 61|  65| 0.00| 29.72| 29.71|29.712| 5.1|253| 18|WSW| 11|261|  442 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 73.5 | 70.8 | 72.3 | 61|  68| 0.00| 29.72| 29.71|29.715| 2.6|254| 15|WSW|  8|252|  258 |
|17| 70.8 | 68.1 | 69.9 | 60|  72| 0.00| 29.73| 29.72|29.721| 1.2|253| 11|  W|  5|252|  147 |
|18| 68.1 | 64.5 | 66.1 | 59|  78| 0.00| 29.74| 29.73|29.733| 0.3|273| 10|  W|  2|261|   26 |
|19| 64.5 | 60.1 | 62.4 | 56|  79| 0.00| 29.77| 29.74|29.753| 0.1|271|  5|WSW|  1|252|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 60.2 | 59.0 | 59.6 | 54|  82| 0.00| 29.79| 29.76|29.777| 0.1|280|  6| SW|  1|251|    0 |
|21| 59.1 | 56.4 | 57.9 | 52|  82| 0.00| 29.81| 29.79|29.796| 0.2|259|  6|WSW|  2|249|    0 |
|22| 56.4 | 55.2 | 56.0 | 51|  83| 0.00| 29.82| 29.81|29.814| 0.1|  5|  4|  N|  1|  9|    0 |
|23| 55.2 | 53.7*| 54.1 | 50|  86| 0.00| 29.83| 29.82|29.827| 0.1|296|  3|  W|  1|309|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.04| 29.83| 29.67|29.723| 1.9|235| 18|WSW| 11|261| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     64.5    | 66.7 | 60|81.0| 1.72|  23  |   1+ | ---- | -- | - |   12+ |   15  | 187.4|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat   0|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                0.0 | of Snow, Ice Pellets or Ice     0 |  .........  | 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.