Pennsylvania frost dates: W
| City | Last frost | First frost | Season | Zone |
|---|---|---|---|---|
| Wagontown | Apr 19 | Oct 25 | 189 d | 7a |
| Wallaceton | May 13 | Oct 1 | 141 d | 6a |
| Wallingford | Mar 30 | Nov 16 | 231 d | 7b |
| Walnut Bottom | Apr 19 | Oct 24 | 188 d | 7a |
| Walnutport | Apr 21 | Oct 23 | 185 d | 6b |
| Walston | May 10 | Oct 12 | 155 d | 6a |
| Waltersburg | Apr 30 | Oct 18 | 171 d | 6b |
| Wampum | Apr 27 | Oct 25 | 181 d | 6b |
| Wapwallopen | Apr 30 | Oct 22 | 175 d | 6b |
| Warfordsburg | Apr 23 | Oct 21 | 181 d | 7a |
| Warminster | Apr 13 | Oct 30 | 200 d | 7a |
| Warren | May 4 | Oct 21 | 170 d | 6a |
| Warren Center | May 5 | Oct 12 | 160 d | 6a |
| Warrendale | Apr 8 | Nov 8 | 214 d | 6b |
| Warrington | Apr 11 | Nov 1 | 204 d | 7a |
| Warriors Mark | Apr 20 | Oct 26 | 189 d | 6b |
| Washington | Apr 24 | Oct 23 | 182 d | 6b |
| Washington Boro | Apr 1 | Nov 10 | 223 d | 7a |
| Washington Crossing | Apr 10 | Nov 1 | 205 d | 7b |
| Washingtonville | Apr 26 | Oct 20 | 177 d | 6b |
| Waterfall | Apr 19 | Oct 28 | 192 d | 6b |
| Waterford | May 7 | Oct 10 | 156 d | 6a |
| Waterville | Apr 30 | Oct 20 | 173 d | 6a |
| Watsontown | Apr 24 | Oct 23 | 182 d | 6b |
| Wattsburg | May 7 | Oct 10 | 156 d | 6a |
| Waverly | Apr 23 | Oct 20 | 180 d | 6a |
| Waymart | May 14 | Oct 1 | 140 d | 6a |
| Wayne | Apr 8 | Oct 31 | 206 d | 7a |
| Waynesboro | Apr 27 | Oct 20 | 176 d | 7a |
| Waynesburg | May 3 | Oct 15 | 165 d | 6b |
| Weatherly | Apr 21 | Oct 23 | 185 d | 6b |
| Webster | Apr 27 | Oct 22 | 178 d | 6b |
| Weedville | May 4 | Oct 11 | 160 d | 6a |
| Weikert | Apr 25 | Oct 19 | 177 d | 6b |
| Wellersburg | Apr 29 | Oct 18 | 172 d | 6b |
| Wells Tannery | Apr 27 | Oct 17 | 173 d | 6b |
| Wellsboro | May 10 | Oct 5 | 148 d | 6a |
| Wellsville | Apr 27 | Oct 18 | 174 d | 7a |
| Wendel | Apr 22 | Oct 25 | 186 d | 6b |
| Wernersville | Apr 26 | Oct 19 | 176 d | 7a |
| West Alexander | Apr 23 | Oct 25 | 185 d | 6b |
| West Chester | Apr 26 | Oct 18 | 175 d | 7a |
| West Decatur | May 13 | Oct 1 | 141 d | 6a |
| West Elizabeth | May 2 | Oct 20 | 171 d | 6b |
| West Finley | Apr 20 | Oct 29 | 192 d | 6b |
| West Grove | Apr 19 | Oct 26 | 190 d | 7a |
| West Hickory | May 1 | Oct 25 | 177 d | 6a |
| West Lebanon | May 2 | Oct 14 | 165 d | 6b |
| West Leisenring | Apr 30 | Oct 18 | 171 d | 6b |
| West Middlesex | Apr 30 | Oct 23 | 176 d | 6a |
| West Middletown | Apr 23 | Oct 25 | 185 d | 6b |
| West Mifflin | Apr 18 | Oct 28 | 193 d | 6b |
| West Milton | Apr 26 | Oct 20 | 177 d | 6b |
| West Newton | Apr 27 | Oct 22 | 178 d | 6b |
| West Pittsburg | Apr 30 | Oct 23 | 176 d | 6b |
| West Point | Apr 24 | Oct 15 | 174 d | 7a |
| West Salisbury | May 12 | Oct 5 | 146 d | 6a |
| West Springfield | May 8 | Oct 16 | 161 d | 6b |
| West Sunbury | May 7 | Oct 14 | 160 d | 6a |
| West Willow | Apr 19 | Oct 24 | 188 d | 7a |
| Westfield | May 10 | Oct 5 | 148 d | 6a |
| Westland | Apr 24 | Oct 23 | 182 d | 6b |
| Westmoreland City | Apr 22 | Oct 25 | 186 d | 6b |
| Weston | Apr 30 | Oct 22 | 175 d | 6b |
| Westover | May 10 | Oct 5 | 148 d | 6a |
| Westport | Apr 29 | Oct 21 | 175 d | 6a |
| Westtown | Apr 26 | Oct 18 | 175 d | 7a |
| Wexford | Apr 24 | Oct 27 | 186 d | 6b |
| Wheatland | May 1 | Oct 17 | 169 d | 6a |
| White | Apr 30 | Oct 17 | 170 d | 6a |
| White Deer | Apr 26 | Oct 20 | 177 d | 6b |
| White Haven | May 7 | Oct 6 | 152 d | 6a |
| White Mills | May 10 | Oct 4 | 147 d | 6a |
| Whitehall | Apr 20 | Oct 24 | 187 d | 7a |
| Whitney | May 1 | Oct 13 | 165 d | 6b |
| Wickhaven | Apr 27 | Oct 22 | 178 d | 6b |
| Wiconisco | May 1 | Oct 16 | 168 d | 6b |
| Widnoon | May 10 | Oct 12 | 155 d | 6b |
| Wilburton | Apr 27 | Oct 20 | 176 d | 6b |
| Wilcox | May 14 | Oct 6 | 145 d | 5b |
| Wildwood | Apr 24 | Oct 27 | 186 d | 6b |
| Wilkes Barre | Apr 23 | Oct 20 | 180 d | 6b |
| Williamsburg | Apr 23 | Oct 21 | 181 d | 6b |
| Williamsport | Apr 25 | Oct 24 | 182 d | 6b |
| Williamstown | May 1 | Oct 16 | 168 d | 6b |
| Willow Grove | Apr 11 | Nov 1 | 204 d | 7b |
| Willow Hill | Apr 18 | Oct 25 | 190 d | 7a |
| Willow Street | Apr 19 | Oct 24 | 188 d | 7a |
| Wilmerding | Apr 5 | Nov 10 | 219 d | 6b |
| Wilmore | May 17 | Oct 2 | 138 d | 6a |
| Winburne | May 13 | Oct 1 | 141 d | 6a |
| Wind Gap | Apr 18 | Oct 25 | 190 d | 6b |
| Wind Ridge | Apr 26 | Oct 21 | 178 d | 6a |
| Windber | Apr 29 | Oct 21 | 175 d | 6a |
| Windsor | Apr 1 | Nov 10 | 223 d | 7a |
| Winfield | Apr 26 | Oct 20 | 177 d | 6b |
| Witmer | Apr 19 | Oct 24 | 188 d | 7a |
| Womelsdorf | Apr 26 | Oct 19 | 176 d | 7a |
| Wood | Apr 23 | Oct 21 | 181 d | 6b |
| Woodbury | Apr 23 | Oct 21 | 181 d | 6b |
| Woodland | May 4 | Oct 11 | 160 d | 6a |
| Woodlyn | Mar 30 | Nov 16 | 231 d | 7b |
| Woodward | May 5 | Oct 6 | 154 d | 6b |
| Woolrich | Apr 30 | Oct 20 | 173 d | 6b |
| Worcester | Apr 24 | Oct 15 | 174 d | 7a |
| Worthington | May 4 | Oct 16 | 165 d | 6b |
| Worthville | May 10 | Oct 12 | 155 d | 6a |
| Woxall | Apr 24 | Oct 15 | 174 d | 7a |
| Wrightsville | Apr 1 | Nov 10 | 223 d | 7a |
| Wyalusing | May 2 | Oct 15 | 166 d | 6a |
| Wyano | Apr 27 | Oct 22 | 178 d | 6b |
| Wycombe | Apr 13 | Oct 30 | 200 d | 7a |
| Wyncote | Apr 4 | Nov 7 | 217 d | 7b |
| Wynnewood | Mar 30 | Nov 17 | 232 d | 7b |
| Wyoming | Apr 23 | Oct 20 | 180 d | 6b |
| Wysox | May 2 | Oct 15 | 166 d | 6a |