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Rule Morning Frost

Bretton Woods - Morning Frost - New England, USA

Bretton Woods, New Hampshire, United States

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

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Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 75% failing

Currently

Real-time conditions
Soil Temperature8.1°C
Dew Point4.4°C (low dew point)
Wind Speed3.4m/s (calm conditions)
Cloud Cover100%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts the first frost events that transform New England's fall foliage into crystalline masterpieces. We track overnight temperatures, dewpoint, and wind conditions to identify when frost will coat leaves, grasses, and stone walls with sparkling ice crystals.

The first hard frost of autumn is a cherished event in New England—it triggers the final phase of fall color and creates magical dawn conditions where ice crystals catch golden light. The region's iconic stone walls, covered bridges, and sugar maples take on new dimension when dusted with frost.

What makes New England frost photography exceptional:

  • Foliage enhancement - Frost crystals on red and orange leaves create otherworldly textures and highlights
  • Stone wall character - New England's ubiquitous dry-stacked stone walls gain definition and drama when frost-covered
  • Sugar maple groves - Vermont and New Hampshire maple stands combine brilliant color with frost textures
  • Historic elements - Colonial-era buildings, covered bridges, and farmsteads gain timeless quality under frost

Best conditions occur on clear, calm nights in October when temperatures drop to 28-32°F. Frost melts quickly after sunrise, so arrive before dawn for frost plus golden hour light. Protected valleys and hollows accumulate frost more heavily than exposed hilltops.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 80 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sun, May 24
24:000%2.4m/s
01:000%2.4m/s
02:000%2.5m/s
03:000%2.7m/s
04:000%2.5m/s
05:000%2.8m/s
06:000%2.6m/s
07:000%2.8m/s
08:000%3.1m/s
09:000%3.4m/s
10:001%3.8m/s
11:001%4.1m/s
12:001%3.7m/s
13:001%3.7m/s
14:001%4m/s
15:001%3.8m/s
16:001%4m/s
17:001%4.1m/s
18:001%3.9m/s
19:001%4.1m/s
20:001%4.1m/s
21:001%3.7m/s
22:001%3.5m/s
23:001%3.7m/s
Mon, May 25
24:0011%3.7m/s
01:0011%3.7m/s
02:0011%3.8m/s
03:0011%3.4m/s
04:0011%3.4m/s
05:0013%2.7m/s
06:0011%2.9m/s
07:0013%2.6m/s
08:0013%2.4m/s
09:0015%1.7m/s
10:0017%0.68m/s
11:0017%0.14m/s
12:0013%2m/s
13:001.2%2m/s
14:001.9%2.6m/s
15:001.9%2.5m/s
16:003.2%2.5m/s
17:003.2%2.6m/s
18:002.4%2.1m/s
19:001.9%2m/s
20:001.2%1.8m/s
21:001.4%1.6m/s
22:001.4%1.6m/s
23:001.4%1.4m/s
Tue, May 26
24:001.8%0.95m/s
01:001.7%0.36m/s
02:001.6%0.25m/s
03:002%0.1m/s
04:002%0.2m/s
05:002%0.39m/s
06:002.3%0.32m/s
07:002.8%0.68m/s
08:004.7%0.86m/s
09:004.6%1.1m/s
10:000%1.2m/s
11:000%1.6m/s
12:000%2.2m/s
13:000%2.4m/s
14:000%3m/s
15:000%3m/s
16:000%3.1m/s
17:000%3.1m/s
18:000%2.7m/s
19:000%2.2m/s
20:000%1.8m/s
21:000%1.7m/s
22:000%1.6m/s
23:000%1.4m/s
Wed, May 27
24:000%1.3m/s
01:000%1.1m/s
02:000%0.97m/s
03:000%1.7m/s
04:000%2.5m/s
05:000%3.2m/s
06:000%3.7m/s
07:000%4.2m/s
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Frost Probability mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
America/New_York
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Sun, May 24 Sunrise 05:10 Sunset 20:15
09:00
4.4°C 8.1°C 5.1°C - 100% 0.04kPa
10:00
3.8°C 7.9°C 4.4°C - 100% 0.04kPa
11:00
3.1°C 7.8°C 3.7°C - 100% 0.03kPa
12:00
2.8°C 7.6°C 3.3°C - 100% 0.03kPa
13:00
2.7°C 7.4°C 3.2°C - 100% 0.03kPa
14:00
2.4°C 7.3°C 2.9°C - 100% 0.03kPa
15:00
2.3°C 7.1°C 2.9°C - 100% 0.03kPa
16:00
2.5°C 6.9°C 3.1°C - 100% 0.03kPa
17:00
2.5°C 6.8°C 3.1°C - 100% 0.03kPa
18:00
2.6°C 6.7°C 3.3°C - 100% 0.04kPa
19:00
2.3°C 6.5°C 3°C - 100% 0.04kPa
20:00
2.1°C 6.4°C 2.8°C - 100% 0.04kPa
21:00
2.1°C 6.2°C 2.9°C - 100% 0.04kPa
22:00
2.5°C 6.1°C 3.4°C - 100% 0.04kPa
23:00
3.1°C 6°C 3.8°C - 100% 0.04kPa
Mon, May 25 Sunrise 05:09 Sunset 20:16
24:00
3.7°C 5.9°C 4.1°C - 100% 0.02kPa
01:00
4.2°C 5.9°C 4.5°C - 100% 0.02kPa
02:00
4.8°C 5.8°C 5°C - 100% 0.01kPa
03:00
5.1°C 5.8°C 5.3°C - 100% 0.01kPa
04:00
5.4°C 5.8°C 5.6°C - 100% 0.01kPa
05:00
5.5°C 5.8°C 5.7°C - 100% 0.01kPa
06:00
5.7°C 5.8°C 5.8°C - 100% 0.01kPa
07:00
5.7°C 5.8°C 5.9°C - 100% 0.01kPa
08:00
6.1°C 5.8°C 6.3°C - 100% 0.01kPa
09:00
6.5°C 5.8°C 6.7°C - 100% 0.01kPa
10:00
6.8°C 5.8°C 7°C - 100% 0.01kPa
11:00
7.1°C 5.9°C 7.3°C - 100% 0.01kPa
12:00
8.5°C 6°C 8.6°C - 100% 0.01kPa
13:00
10°C 6.1°C 11°C - 100% 0.05kPa
14:00
11°C 6.3°C 12°C - 100% 0.12kPa
15:00
11°C 6.5°C 13°C - 100% 0.2kPa
16:00
10°C 6.8°C 14°C - 100% 0.31kPa
17:00
10°C 7°C 14°C - 100% 0.32kPa
18:00
10°C 7.3°C 13°C - 100% 0.25kPa
19:00
10°C 7.4°C 12°C - 100% 0.14kPa
20:00
10°C 7.6°C 11°C - 100% 0.06kPa
21:00
9.4°C 7.6°C 10°C - 100% 0.06kPa
22:00
8.1°C 7.6°C 8.8°C - 100% 0.05kPa
23:00
7.8°C 7.6°C 8.6°C - 100% 0.06kPa
Tue, May 26 Sunrise 05:09 Sunset 20:17
24:00
7.5°C 7.6°C 8.6°C - 86% 0.08kPa
01:00
6.5°C 7.6°C 7.2°C - 77% 0.05kPa
02:00
5.8°C 7.5°C 6.6°C - 100% 0.06kPa
03:00
5.5°C 7.4°C 6.5°C - 100% 0.06kPa
04:00
5.6°C 7.3°C 6.6°C - 100% 0.07kPa
05:00
5.6°C 7.3°C 6.8°C - 100% 0.08kPa
06:00
5.9°C 7.2°C 8°C - 100% 0.14kPa
07:00
7.7°C 7.3°C 11°C - 99% 0.22kPa
08:00
8°C 7.4°C 13°C - 7% 0.45kPa
09:00
7.9°C 7.7°C 17°C - 5% 0.84kPa
10:00
7.7°C 8.1°C 19°C - 3% 1.1kPa
11:00
7.6°C 8.5°C 20°C - 0% 1.3kPa
12:00
7.6°C 9°C 21°C - 0% 1.4kPa
13:00
7.6°C 9.4°C 21°C - 0% 1.5kPa
14:00
7.7°C 9.8°C 22°C - 0% 1.6kPa
15:00
9.4°C 11°C 20°C - 33% 1.1kPa
16:00
11°C 11°C 18°C - 67% 0.82kPa
17:00
11°C 12°C 16°C - 100% 0.54kPa
18:00
11°C 12°C 15°C - 83% 0.38kPa
19:00
11°C 12°C 14°C - 66% 0.24kPa
20:00
11°C 12°C 12°C - 49% 0.12kPa
21:00
11°C 12°C 12°C - 66% 0.1kPa
22:00
11°C 12°C 12°C - 83% 0.09kPa
23:00
12°C 12°C 12°C - 100% 0.07kPa
Wed, May 27 Sunrise 05:08 Sunset 20:18
24:00
12°C 12°C 13°C - 100% 0.07kPa
01:00
12°C 12°C 13°C - 99% 0.07kPa
02:00
13°C 12°C 13°C - 99% 0.06kPa
03:00
12°C 12°C 15°C - 96% 0.27kPa
04:00
12°C 12°C 17°C - 93% 0.53kPa
05:00
11°C 12°C 19°C - 90% 0.83kPa
06:00
10°C 12°C 19°C - 76% 1kPa
07:00
9.1°C 13°C 20°C - 62% 1.2kPa
08:00
7.9°C 13°C 21°C - 48% 1.4kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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