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Concrete Pouring Weather in Annapolis, MD: 10-Day Windows & Best Months

Annapolis gives you roughly 145 workable concrete pouring days a year, concentrated April through October. The single best month is October, averaging 22 days that clear every check — highs of 69°F, lows near 46°F, and a 26% daily rain chance. Below: the live 10-day check and Annapolis's full month-by-month table.

GOOD — a clean label day MARGINAL — one borderline check NO — hard fail or stacked flags

The rules this check uses

Typical bagged-mix requirements for small DIY pours, scored against Annapolis's forecast above. The 48-hour freeze rule dominates every other row; structural work follows engineer/ACI specs instead of this table.

Typical label thresholds for concrete pouring — the ruleset behind every Annapolis verdict above.
CheckThresholdWhy it matters
Air temperature 40–90°F — ideal 50–85°F DIY pours work from 40–90°F; 50–85°F is the sweet spot.
Overnight low ≥40°F during the first 48 h A low under 40°F inside the first 48 hours puts you in cold-weather concreting — not a DIY window.
Dry before no soaking (≥1.0") in the prior 24 h What fell before you start matters as much as what falls after — surfaces hold water invisibly.
Dry after <0.1" rain for 6 h after (12 h light rain after finishing still risks surface marks) The make-or-break window: rain here undoes the work, not just delays it.
Wind ≤20 mph (rapid surface drying up to 28 mph) Scored on the windiest working hour; the marginal band changes the method, not the day.

Always follow your product label — formulas vary. Treat the table as the consensus range across brands — the label in your hand is the final word.

Best months for concrete pouring in Annapolis

How Annapolis months rank: temperature-rule days minus NOAA rain odds, from 1991–2020 normals. An estimate for planning, not a forecast.
MonthAvg highAvg lowRain odds/dayWorkable days 
January 44°F 25°F 31% 0
February 47°F 26°F 32% 0
March 55°F 33°F 33% 0
April 66°F 44°F 34% 16
May 75°F 54°F 34% 20
June 84°F 63°F 34% 20
July 88°F 67°F 30% 22
August 86°F 65°F 28% 22
September 80°F 58°F 26% 22
October 69°F 46°F 26% 22
November 58°F 36°F 25% 0
December 48°F 29°F 31% 0

Figure 145 workable days a year in Annapolis, spread across April through October. Shoulder months turn on the overnight rule: an afternoon at 66°F passes, but the 40°F night floor is what actually opens the season in April. Neighboring towns shift by a month or more — the Maryland comparison shows where Annapolis sits.

Sealing the same driveway later? Sealcoating in Annapolis wants warmer nights (50°F+) than the pour did.

The assigned NOAA station (Upper Marlboro 3 Nnw, Md Us) is 26.4 km from town — normal for this area's station network. Month rankings hold; exact day counts may shift a day or two either way. The live forecast check uses the city's own coordinates. The exact formula lives in the methodology.

Annapolis by the numbers

Prep checklist

  1. Clear the 48-hour rule first: two nights over 40°F. April opens that door in Annapolis; January (25°F average lows) slams it.
  2. Stage everything before mixing: forms braced, base compacted and damp, tools rinsed, help booked.
  3. Cut plastic sheeting and weight it at the pour's edge — Annapolis sees rain on 26% of October days, and the 6-hour rule doesn't negotiate.
  4. Resist the watery mix: it finishes easier today and dusts forever after. Low slump wins.
  5. Work the sequence: screed on the sheen, float as it dulls, and leave bleed water alone.
  6. Edge and joint with an edger + float set — control joints every 2–3 slab-thicknesses in feet.
  7. Hold the moisture in (sheeting or misting); when October nights dip toward 46°F, a curing blanket is the difference.
  8. Traffic schedule: feet at 24–48 hours, tires near day 7. Anything structural runs on engineer/ACI specs, not this checklist.

Gear that saves a window

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FAQ

What temperature is too cold to pour concrete?

The line is a 40°F low inside the first 48 hours; an actual freeze (32°F) physically damages young concrete. Annapolis's January nights average 25°F — firmly out — while October nights hold near 46°F. Small pours only; structural work follows engineer/ACI specs.

Can you pour concrete before rain?

The engine wants 6 protected hours; light rain later actually feeds the cure. With 34% rain-day odds in April versus 25% in November, Annapolis's dry-season pours barely think about this rule and wet-season pours live by the radar. For small DIY pours; structural schedules follow ACI.

How long does concrete need to be protected from freezing?

Keep it above freezing for at least the first 48 hours (the engine calls any sub-40°F low in that window a NO). In Annapolis that rules out roughly January-adjacent months entirely and makes shoulder-season pours a two-night forecast decision. DIY scope; anything structural follows engineer/ACI cold-weather practice.

Is it OK to pour concrete in hot weather?

To a 90°F high, yes — with shade, cool mix water, a damp subgrade, and a dawn start. Above 90°F the surface sets while the core is plastic and shrinkage cracks map the slab. Annapolis averages 0 such days in July — rarely the binding constraint here.

How long before you can drive on new concrete?

A week before tires, 24–48 hours before feet — at October-typical Annapolis temperatures (69°F highs). When nights slide toward 25°F, add days: cure speed is temperature. Early loads print permanent marks; the bag's cure table wins every argument.

Best season for concrete work in Annapolis?

The table above says October, August and September: enough warmth for the 48-hour cure, short of the 90°F ceiling. For small DIY pours that's the whole answer; structural pours schedule to engineer/ACI requirements, not to a best-months chart.

Other projects in Annapolis

Concrete Pouring nearby

Guides

Climatology: NOAA 1991–2020 normals via UPPER MARLBORO 3 NNW, MD US (26.4 km from Annapolis center, elevation 130 ft); live outlook by Open-Meteo.