The Littleton plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
MILE1
TODAY
Today in Littleton
NWS forecast and National Blend of Models · updated 1:00 PM EDT
RIGHT NOWSt. Johnsbury - Fairbanks (K1V4) · 1:54 PM
60°SunnyFeels like 60° · high of 61° near 3 PM
WindCalmno gusts
Humidity78%falling to 75% this afternoon
Pressure29.98 in →steady
Visibility— mifog or heavy haze
CloudsClear
UV index1 by 10 AMlow
Dew point 53° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Friday, about 9 AMin about 66 hours · 68% chance · rain
LIKELY AMOUNT0.06–0.4 inmost likely 0.3; 1 in 10 over 0.7
LAST RAIN—none in 31 days
ALERTS & OUTLOOKS
No watches or warnings for Grafton County
NWS Gray and the Storm Prediction Center · checked 2:50 PM
SUN & MOON
↑ 6:42 AM6:32 PM ↓
11 h 50 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
12
GOODAir quality index · fine particles
Tomorrow: None, good. No pollen source yet.
The next three days, hour by hour
Sky: clear, cloudy, nightRain likelyNational Blend of Models
Forecast, with the range 8 in 10 ensemble members agree onNormal, about 64° / 43°
TUESept. 29Mostly cloudy
61°48°
0% rain—NNW 3A
WEDSept. 30Mostly cloudy; warmer
72°52°
0% rain—N 0B
THUOct. 1Partly cloudy
79°60°
0% rain—SSW 3B
FRIOct. 2Showers likely
75°45°
70% rain0.06–0.4″WNW 2C
SATOct. 3Mostly sunny; cooler
64°36°
0% rain—NNW 1C
SUNOct. 4Chance of showers
63°41°
30% rainup to 0.1″S 1C
MONOct. 5Partly cloudy
59°33°
20% rain—WNW 3C
How sure are we?AModels agree: highs within 4°BSome spread: within 8°CWide spread: check backRange from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL
Where today’s air came from
The air arriving over Littleton about 5,000 feet above the ground was over the North Atlantic three days ago, and over the western Atlantic a day ago, about 1,330 miles back along its path. Most of the nine paths traced from around the city agree. It rose from near the ground on the way. Near the ground the air came from Canada; at 10,000 feet, from New England. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.