Discover the best time of year, based on historical climate, temperature, and precipitation.
The best weather in Andover is from May, June, August. — consistent weather climate
🌦Humid
| Score | 12 | 14 | 17 | 37 | 82 | 80 | 71 | 79 | 76 | 68 | 38 | 11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Climate | Polar | Cold | Cold | Cold | Mild | Humid | Humid | Humid | Humid | Cool & rainy | Cold | Cold |
| Temperature | -5–4°C | -5–5°C | -1–9°C | 4–14°C | 9–20°C | 15–26°C | 19–29°C | 18–28°C | 14–23°C | 9–18°C | 3–11°C | -2–6°C |
| Feels like | -9–-1°C | -10–1°C | -5–6°C | 0–11°C | 7–19°C | 15–27°C | 20–31°C | 19–29°C | 14–23°C | 7–16°C | -1–8°C | -6–2°C |
| Precipitation | 100mm 11 days | 73mm 10 days | 115mm 10 days | 105mm 11 days | 87mm 8 days | 86mm 10 days | 139mm 11 days | 101mm 9 days | 129mm 9 days | 109mm 9 days | 71mm 6 days | 130mm 9 days |
| Sunshine | 5.4h ☀︎ 57% | 6.6h ☀︎ 62% | 7.9h ☀︎ 66% | 7.7h ☀︎ 57% | 10.7h ☀︎ 73% | 10.8h ☀︎ 71% | 10.9h ☀︎ 73% | 10.3h ☀︎ 74% | 8.7h ☀︎ 70% | 7.5h ☀︎ 68% | 7.1h ☀︎ 73% | 5.5h ☀︎ 60% |
| Wind | NW · 19 km/h | W · 19 km/h | W · 20 km/h | W · 19 km/h | W · 18 km/h | SW · 16 km/h | SW · 15 km/h | SW · 15 km/h | W · 15 km/h | W · 16 km/h | W · 19 km/h | W · 18 km/h |
| Humidity (%) | 68% | 68% | 65% | 67% | 67% | 70% | 75% | 74% | 77% | 77% | 69% | 72% |
| Day length | 9.5h | 10.6h | 12.0h | 13.4h | 14.6h | 15.3h | 14.9h | 13.9h | 12.5h | 11.0h | 9.8h | 9.1h |
Conventional New England wisdom points to crisp May mornings or September's foliage rush, but late August is Andover's quiet masterstroke, pairing unhurried late-summer warmth with an emptiness you will not find once autumn arrives.
Tucked twenty miles north of Boston where the Shawsheen River feeds toward the Merrimack River, Andover wears its deep colonial timeline with quiet confidence. This is old Cochichawick, land of the Massachusett people shaped by river runs and ancient oak groves, long before seventeenth-century homesteaders plotted out its greens. Most visitors assume that touring this pocket of Essex County demands either the tender green blooms of late spring or the postcard frenzy of autumn. That instinct is mistaken. A standard climate chart will tell you May is flawless, but it misses what happens on the ground. Late August offers the true summit of the local year: deep summer heat, long golden evenings, and a town that has briefly emptied itself of crowds just before the autumn crush takes over.
August is the month Andover belongs entirely to whoever is lucky enough to wander in. On paper, meteorologists might lean toward late spring, but August wins on pure rhythm. While July can occasionally bring sudden drenching downpours that drive everyone off the footpaths, August settles into a warm, dry hum. Daytime temperatures hover comfortably near 28 degrees, the air feels full and ripe, and the town settles into an unhurried, low-gear cadence.
Because the calendar marks this as a quiet lull before the regional schools and universities wake up, the streets around Main Street lose their commuter friction. You can walk beneath the cathedral canopies of mature sugar maples without dodging hurried traffic, listen to the river slip past ancient mill stones, and spend ten unbroken hours under sunlight that feels honeyed rather than punishing.
July shares some of this unhurried peace, though it trades away stability for tropical humidity and the occasional afternoon thunderstorm that clears the sidewalks. If you come in high summer, choose August every time. It gives you the full, unhurried sensory texture of inland Massachusetts without demanding that you share it with bus tours or leaf-peepers.
If you look purely at weather charts, May appears to be the undisputed champion. The sunlight hours spike, the rain remains moderate, and the thermometer climbs toward what looks like effortless perfection. The sensory reality, however, is sharper. May mornings in the Merrimack Valley often carry a stubborn damp chill that requires heavy woolen layers until noon, and the black flies and muddy riverbanks can make woodland rambling an endurance test.
June delivers on the promises May merely whispers. By early summer, the soil has finally shaken off months of frost, the town green turns a vibrant, vivid emerald, and dinner outdoors becomes an effortless habit rather than an act of optimism. The warmth feels genuine, settling right around mid-summer comfort where a linen shirt suffices well past dusk.
Yet both months carry an underlying busyness that August simply avoids. Spring in this corner of Massachusetts is a season of constant activity, school pageantry, and shoulder-season momentum. It is undeniably pretty, but you will feel the town's gears turning in a way they simply do not during the dog days of late summer.
September is when the world descends on Andover, and the shift is instantaneous. The town hits its absolute peak density of the year practically overnight. Commuters clog the arterial roads, sidewalks fill, and the quiet pastoral dignity that defines the place gets swallowed by the autumn rush. Compounding the crowds, September brings some of the heaviest, most concentrated rain bursts on the local calendar, turning what should be crisp afternoons into sudden, soaking scrambles for shelter.
There is no denying the visual spectacle once the leaves begin their change in October. The air dries out, the humidity vanishes completely, and the afternoon light takes on that classic slate-and-amber New England edge. Walking through neighborhoods dense with historic timber frames against a backdrop of blazing foliage is iconic for a reason.
Just be prepared for the cold to nip at your heels earlier than anticipated. By mid-October, when the sun dips behind the ridge lines, temperatures tumble fast toward freezing. If you must travel during the autumn wave, aim for the middle of October when the foot traffic thins slightly and the foliage reaches its peak, but accept that you will be sharing every scenic vista and cafe terrace with plenty of company.
Winter in the Merrimack Valley is serious, long, and uncompromising. From late November through March, Andover retreats indoors. December brings short, gloomy days and biting sleet that coats the granite curbs in slick ice, while January and February plunge the town into a deep freeze where apparent temperatures stay below zero and the wind whips relentlessly across open fields.
For a traveler seeking historic solitude, there is a stark, severe beauty to colonial houses framed by bare branches and thick snowdrifts. But it is not a wandering season. Footpaths along the Shawsheen River freeze into hazardous ruts, daylight disappears by four in the afternoon, and the town's social life retreats behind double-glazed windows and hearth fires.
March and April offer little relief to the casual visitor. Known locally as mud season, early spring is characterized by grey skies, slushy run-off, and heavy rain that soaks the dormant landscape without the compensation of summer greenery. Unless your journey is tied to family or specific local business, leave this half of the calendar alone.