select pnm,lnm,st_cd,st_nm,cnty_id,dm,dm_date,dm_hist,avg_tmax_data,avg_tmin_data,avg_prcp_data,rec_hi_data,rec_lo_data,avg_sndp_data,x,y,ff,lf,fd,hz,er,hz_source,kg,hzd,clim_stn_nm,hz12,hz90, feels_like_min,feels_like_max,days_of_prcp,snow,cloud_cover,humidity,wind_speed from worldtg8_pm.pm_climate_points_namer where surl = 'alstead' and st_surl='new-hampshire' and iso_cc = 'US' and prim_loc in (1,2) Alstead New Hampshire Climate Data - Updated February 2026

Alstead New Hampshire Climate Data

Monthly Average Climate Data for Alstead New Hampshire

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January12.5 °F29.0 °F3.43 in.
February13.9 °F32.0 °F3.12 in.
March21.8 °F39.9 °F3.68 in.
April33.4 °F53.8 °F4.02 in.
May44.1 °F65.8 °F4.07 in.
June54.4 °F73.9 °F4.66 in.
July59.8 °F78.7 °F4.77 in.
August56.9 °F77.4 °F4.49 in.
September49.5 °F70.3 °F4.31 in.
October39.8 °F57.6 °F5.09 in.
November29.4 °F45.5 °F3.77 in.
December20.7 °F34.7 °F4.3 in.
Annual36.4 °F54.9 °F49.71 in.

Climate Data for Alstead New Hampshire

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness ZoneZone 5b : -15°F to -10°F
Plant Hardiness Zone - 2012Zone 5a : -20°F to -15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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