There are very few sources of reliable wind speed and direction available for most US cities and towns. Communities as small as Choteau and Townsend only have limited *met* data available on a long term basis.
Even then the only reliable met data usually available for those smaller cities and towns is for temperature and precipitation.
The best source of historical climatological data for the western USA is at the Desert Research Institute (DRI) at the University of Nevada - Reno.
Here's the link the Western Regional Climate Center at DRI:
http://www.wrcc.dri.edu/ Below is a cut & paste of the monthly & annual wind speed averages based on the most recent decadal records for selected locations in Montana.
These locations are where NOAA-NWS has maintained fully instrumented sites; Great Falls is the closest site to Choteau, and Helena is the closest site to Townsend.
MONTANA
AVERAGE WIND SPEED - MPH
STATION | ID | Years | Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec | Ann
BAKER AIRPORT ASOS |KBHK|1998-2006| 10.4 10.5 12.2 12.5 12.7 11.7 10.7 10.8 10.0 10.3 10.5 10.7 | 11.1
BILLINGS-LOGAN AP ASOS |KBIL|1996-2006| 12.8 12.2 11.0 10.5 10.4 10.0 9.3 9.2 9.6 10.3 12.0 13.0 | 10.9
BOZEMAN AIRPORT ASOS |KBZN|1996-2006| 4.6 5.3 6.4 7.2 7.0 6.3 6.3 6.4 6.1 5.7 4.9 4.8 | 5.9
BUTTE AIRPORT ASOS |KBTM|1996-2006| 4.7 5.0 6.8 7.3 7.7 7.3 6.9 6.6 6.2 6.2 5.2 4.9 | 6.2
CUT BANK AIRPORT ASOS |KCTB|1996-2006| 14.6 12.8 13.3 12.8 13.4 12.3 11.2 10.2 11.4 13.0 13.6 14.6 | 12.8
DILLON AIRPORT ASOS |KDLN|1997-2006| 10.2 9.7 10.3 10.0 9.6 8.4 8.0 8.0 8.7 9.0 9.3 9.2 | 9.2
GLASGOW AIRPORT ASOS |KGGW|1996-2006| 9.3 9.3 11.7 12.4 12.6 11.4 10.7 11.0 10.5 10.3 9.3 9.4 | 10.6
GLENDIVE AIRPORT AWOS |KGDV|1996-2006| 9.5 9.7 10.5 11.3 11.6 10.4 9.4 9.6 9.6 10.1 9.7 10.2 | 10.1
GREAT FALLS AP ASOS |KGTF|1996-2006| 13.3 12.3 11.8 11.2 11.3 10.2 9.6 9.2 10.4 11.9 13.2 13.8 | 11.5GREAT FALLS-MALSTROM AF |KGFA|1996-2006| 12.3 9.9 11.9 10.7 10.3 9.7 9.1 8.8 9.9 10.4 13.2 13.2 | 10.9
HAVRE AIRPORT ASOS |KHVR|1996-2006| 9.9 9.6 10.7 11.0 11.6 10.6 9.8 9.5 9.8 9.8 10.6 11.0 | 10.3
HELENA AIRPORT ASOS |KHLN|1996-2006| 5.8 6.3 7.8 8.3 8.4 8.2 7.4 6.6 6.7 6.6 5.8 6.0 | 7.0JORDAN AIRPORT ASOS |KJDN|1996-2006| 7.3 7.9 9.3 10.0 10.5 9.7 8.4 8.4 8.2 8.2 7.9 8.1 | 8.6
KALISPELL AIRPORT ASOS |KGPI|1996-2006| 4.1 3.8 6.0 6.7 6.6 5.7 5.2 5.0 4.6 4.2 4.0 3.2 | 4.9
LEWISTOWN AIRPORT ASOS |KLWT|1996-2006| 10.6 9.5 10.2 9.8 9.9 9.0 7.9 8.0 8.5 9.2 10.2 10.7 | 9.5
LIVINGSTON AIRPORT ASOS |KLVM|1996-2006| 19.8 17.4 16.2 14.0 13.1 11.9 11.0 11.2 12.7 14.6 18.4 20.4 | 15.2
MILES CITY AP ASOS |KMLS|1996-2006| 8.8 9.4 10.6 11.2 11.3 10.5 9.9 9.7 9.7 9.7 9.3 9.3 | 9.9
MISSOULA AIRPORT ASOS |KMSO|1996-2006| 3.2 3.7 5.4 6.1 6.0 6.1 5.7 5.2 4.3 3.9 3.5 3.7 | 4.7
SIDNEY AIRPORT AWOS |KSDY|1996-2006| 8.9 9.0 9.5 10.2 10.4 9.0 7.7 7.9 8.2 8.8 8.7 9.4 | 9.0
WOLF POINT AIRPORT ASOS |KOLF|1998-2006| 7.1 7.6 9.4 10.3 10.4 8.9 8.2 8.3 7.6 7.7 7.3 7.6 | 8.3