LOCAL CLIMATOLOGICAL DATA
Hourly Summary
July 21, 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| 65.0 | 63.5*| 64.4 | 56|  75| 0.00| 29.84| 29.83|29.836| 0.4|174|  8|SSE|  2|185|    0 |
|01| 65.2 | 64.6 | 64.9 | 56|  73| 0.00| 29.83| 29.80|29.816| 0.4|169|  7|  S|  2|172|    0 |
|02| 65.1 | 64.1 | 64.4 | 56|  74| 0.00| 29.81| 29.80|29.799| 0.2|176|  6|  S|  1|174|    0 |
|03| 64.6 | 64.1 | 64.4 | 55|  72| 0.00| 29.80| 29.79|29.794| 0.4|170| 10|SSE|  2|159|    0 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|04| 65.3 | 64.5 | 65.0 | 55|  71| 0.00| 29.80| 29.79|29.795| 1.4|179| 16|SSE|  4|171|    0 |
|05| 65.9 | 65.0 | 65.3 | 56|  71| 0.00| 29.80| 29.77|29.787| 1.8|175| 17|SSE|  5|147|    4 |
|06| 65.9 | 65.2 | 65.6 | 56|  72| 0.00| 29.78| 29.76|29.771| 1.6|173| 17|  S|  5|165|   46 |
|07| 67.9 | 65.0 | 65.8 | 58|  76| 0.00| 29.77| 29.75|29.762| 0.7|174|  9|SSE|  3|185|  143 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|08| 72.4 | 67.9 | 70.2 | 61|  73| 0.00| 29.75| 29.74|29.747| 1.8|173| 15|SSE|  5|178|  365 |
|09| 73.3 | 70.4 | 72.4 | 63|  72| 0.00| 29.75| 29.73|29.737| 2.0|178| 18|SSE|  4|156|  264 |
|10| 71.8 | 70.0 | 70.7 | 63|  77| 0.00| 29.73| 29.72|29.723| 2.7|177| 22|  S|  5|193|  210 |
|11| 72.2 | 70.4 | 71.1 | 64|  78| 0.00| 29.73| 29.72|29.728| 3.1|184| 16|SSW|  7|185|  161 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|12| 72.1 | 70.9 | 71.6 | 65|  79| 0.00| 29.73| 29.67|29.703| 3.1|176| 18|WSW|  7|181|  252 |
|13| 72.2 | 70.8 | 71.6 | 65|  80| 0.00| 29.68| 29.66|29.676| 2.1|161| 14|SSE|  6|188|  164 |
|14| 70.9 | 70.4 | 70.7 | 65|  82| 0.00| 29.68| 29.65|29.668| 1.3|171| 13| SE|  3|166|  107 |
|15| 74.3*| 70.5 | 72.3 | 66|  81| 0.00| 29.65| 29.63|29.637| 1.6|160| 12|  E|  4|163|  253 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|16| 74.2 | 71.5 | 73.1 | 66|  78| 0.00| 29.63| 29.61|29.621| 2.0|146| 13|  S|  5|175|  253 |
|17| 71.6 | 70.6 | 71.0 | 65|  81| 0.00| 29.62| 29.60|29.613| 1.4|154| 11|SSW|  4|175|  107 |
|18| 71.1 | 70.7 | 70.9 | 65|  81| 0.00| 29.61| 29.58|29.588| 1.3|118| 10| NE|  5|156|   62 |
|19| 70.9 | 69.5 | 70.3 | 65|  82| 0.00| 29.59| 29.57|29.578| 1.6|141| 10|  E|  4|138|   18 |
|  |      |      |      |   |    |     |      |      |      |    |   |   |   |   |   |      |
|20| 69.9 | 69.3 | 69.7 | 64|  83| 0.00| 29.57| 29.56|29.569| 1.4|160| 15|SSE|  4|144|    3 |
|21| 69.8 | 69.3 | 69.6 | 64|  83| 0.00| 29.58| 29.56|29.569| 1.2|139| 13| SE|  4|106|    0 |
|22| 69.5 | 68.3 | 69.0 | 64|  84| 0.00| 29.56| 29.52|29.544| 1.0|136| 10|SSE|  4|159|    0 |
|23| 68.4 | 67.3 | 67.9 | 63|  86| 0.00| 29.52| 29.50|29.509| 0.6|139|  9| SE|  3|101|    0 |
+--+------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- |Total|                For the day:                 | ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   | ---- | ---- | ---- | - | -- | 0.00| 29.84| 29.50|29.690| 1.5|165| 22|  S|  7|181| ---- |
   +------+------+------+---+----+-----+------+------+------+----+---+---+---+---+---+------+
   |     Avg     | Mean |Avg| Avg|Month| Hour | Hour | ---- | -- | - |  Hour |  Hour |  Avg |
   +-------------+------+---+----+-----+------+------+------+----+---+-------+-------+------+
   |     68.9    | 68.8 | 62|77.6| 1.42|   0  |  23  | ---- | -- | - |   10  |   12  | 100.4|
   +-------------+------+---+----+-----+------+------+------+----+---+----+--+---+---+------+
   | Total Snow,        |                                   |             |      |  Heat   0|
   | Ice Pellets        | Greatest Depth on Ground          | Precip Types|Degree+----------+
   |                0.0 | of Snow, Ice Pellets or Ice     0 |  .........  | Days |  Cool   4|
   +--------------------+-----------------------------------+-------------+------+----------+

  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.