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Rule Fog Hunter

Bibury - Fog Hunter - Cotswolds

Bibury, England, United Kingdom

Thick, moody fog for atmospheric forest and landscape shots

Currently

Real-time conditions
Dewpoint Spread0.4°C
Visibility18750 (Clear)
Relative Humidity97%
Wind Speed5.7m/s (moderate winds)

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/London
fog weather icon
Next opportunity
Moderate Fog
Bibury
Today · 22:00–03:00 · 5h window
Medium confidence
45%
🌫️Fog Probability69.7-73.8%
Dewpoint Spread: 0.2°C
Visibility: 874 (Fog)
Relative Humidity: 98%
Wind Speed: 5.2m/s (moderate winds)

What this forecast looks for

Plain-language explanation from the rule

This forecast tracks morning mist and fog conditions that transform the Cotswolds' gentle landscapes into atmospheric scenes worthy of a Constable painting. We monitor temperature inversions, humidity levels, and overnight cooling to predict when valley fog will blanket the honey-stone villages and rolling hills.

The Cotswolds' distinctive topography of shallow river valleys creates perfect conditions for radiation fog and valley mist. Cold air pools in valleys overnight, and when combined with moisture from the River Windrush and its tributaries, creates dreamy morning conditions that soften the already pastoral landscape.

What makes Cotswolds fog photography special:

  • Slad Valley inversions - Laurie Lee's famous valley fills with morning mist, with hilltop villages emerging as islands above the fog layer
  • Arlington Row mist - Bibury's iconic weavers' cottages partially obscured by dawn fog, with honey-stone glowing through the haze
  • Valley villages - Bourton-on-the-Water and Lower Slaughter with fog settled along their streams, stone bridges emerging from mist
  • Church tower beacons - Stow-on-the-Wold and Painswick church towers rising above fog blankets, marking village locations

The best fog photography occurs on calm, clear autumn and winter mornings (September-March) following cold nights. Slad Valley—immortalized in Laurie Lee's "Cider with Rosie"—is particularly reliable for valley fog, with viewpoints along the valley rim offering elevated perspectives. Arlington Row benefits from mist rising from the River Coln, creating dreamy morning compositions of England's most photographed street. Arrive before dawn to capture the transition from pre-dawn blue light through foggy golden hour. Fog typically burns off by mid-morning, creating a narrow window of opportunity.

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72-hour requirements breakdown

What passed or failed, hour by hour
5matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/London
Fog Probability
≥ 60.0%
Mon, Apr 13
20:000%
21:000%
22:000%
23:000%
Tue, Apr 14
24:000%
01:000%
02:000%
03:000%
04:000%
05:000%
06:000%
07:0037%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0070%
23:0074%
Wed, Apr 15
24:0070%
01:0071%
02:0070%
03:0039%
04:0042%
05:0042%
06:0039%
07:0030%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:000%
23:000%
Thu, Apr 16
24:000%
01:000%
02:000%
03:000%
04:0028%
05:0019%
06:0021%
07:0035%
08:0019%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:000%
17:000%
18:000%
19:000%
20:000%
21:000%
22:0050%
23:0055%
Fri, Apr 17
24:0044%
01:0044%
02:000%
03:000%
04:000%
05:000%
06:000%
07:000%
08:000%
09:000%
10:000%
11:000%
12:000%
13:000%
14:000%
15:000%
16:0015%
17:0015%
18:000%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Fog 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
Europe/London
Clear Sky Probability (Ensemble)
%
Dew Point
°C
Rainfall
mm
Relative Humidity
%
Snowfall
cm
Solar Elevation
°
Temperature
°C
Total Precipitation
mm
Vapor Pressure Deficit
kPa
Visibility
m
Wind Gusts
m/s
Wind Speed
m/s
Tue, Apr 14 Sunrise 06:13 Sunset 20:02
20:00
0% 9.7°C 0mm 97% 0cm 0.13° 10°C 0.06mm 0.04kPa 18750m 12m/s 5.7m/s
21:00
0% 9.9°C 0mm 98% 0cm -8.9° 10°C 0.13mm 0.03kPa 2583m 12m/s 5.6m/s
22:00
0% 10°C 0.01mm 98% 0cm -17° 10°C 0.13mm 0.02kPa 1774m 12m/s 5.5m/s
23:00
0% 10°C 0mm 98% 0cm -23° 10°C 0.13mm 0.02kPa 874m 12m/s 5.2m/s
Wed, Apr 15 Sunrise 06:13 Sunset 20:02
24:00
0% 10°C 0mm 98% 0cm -27° 11°C 0.13mm 0.02kPa 1727m 11m/s 5m/s
01:00
0% 10°C 0mm 99% 0cm -29° 11°C 0.13mm 0.02kPa 507m 12m/s 5.3m/s
02:00
0% 11°C 0mm 98% 0cm -27° 11°C 0mm 0.02kPa 2513m 12m/s 5.5m/s
03:00
0% 10°C 0mm 97% 0cm -24° 11°C 0mm 0.04kPa 18414m 12m/s 5.4m/s
04:00
0% 11°C 0mm 98% 0cm -18° 11°C 0mm 0.03kPa 9287m 12m/s 5.1m/s
05:00
0% 11°C 0mm 98% 0cm -11° 11°C 0.06mm 0.03kPa 5819m 12m/s 5.1m/s
06:00
0% 11°C 0mm 98% 0cm -2.4° 11°C 0.06mm 0.03kPa 18334m 12m/s 5.1m/s
07:00
0% 11°C 0mm 97% 0cm 6.7° 11°C 0.06mm 0.04kPa 18503m 12m/s 5.4m/s
08:00
0% 11°C 0mm 96% 0cm 16° 11°C 0mm 0.06kPa 24135m 12m/s 5.8m/s
09:00
0% 11°C 0mm 94% 0cm 25° 12°C 0mm 0.08kPa 24135m 12m/s 6.4m/s
10:00
0% 11°C 0mm 94% 0cm 33° 12°C 0mm 0.09kPa 24135m 13m/s 6.6m/s
11:00
0% 11°C 0mm 90% 0cm 41° 13°C 0.13mm 0.14kPa 12866m 13m/s 7.3m/s
12:00
0% 12°C 0mm 85% 0cm 46° 14°C 0.63mm 0.25kPa 16739m 15m/s 8.7m/s
13:00
0% 12°C 0mm 83% 0cm 48° 15°C 1mm 0.29kPa 14016m 16m/s 9.7m/s
14:00
0% 12°C 0mm 83% 0cm 47° 15°C 0.44mm 0.3kPa 14649m 16m/s 10m/s
15:00
0% 12°C 0mm 89% 0cm 42° 14°C 0.94mm 0.17kPa 18364m 15m/s 9.6m/s
16:00
0% 12°C 0mm 88% 0cm 35° 14°C 1.4mm 0.18kPa 11321m 14m/s 9.4m/s
17:00
3% 11°C 0mm 87% 0cm 27° 13°C 1.8mm 0.19kPa 17070m 11m/s 7.5m/s
18:00
5% 10°C 0mm 84% 0cm 18° 13°C 2mm 0.23kPa 24134m 11m/s 6.7m/s
19:00
8% 9.1°C 0mm 86% 0cm 11°C 2.1mm 0.19kPa 24134m 11m/s 6.2m/s
20:00
35% 8.3°C 0mm 89% 0cm 0.34° 10°C 0.06mm 0.13kPa 24135m 11m/s 5.3m/s
21:00
62% 7.9°C 0mm 91% 0cm -8.7° 9.3°C 0.13mm 0.11kPa 24134m 12m/s 5.7m/s
22:00
89% 6.9°C 0mm 93% 0cm -16° 8°C 0.13mm 0.08kPa 24135m 13m/s 6m/s
23:00
74% 6.7°C 0mm 94% 0cm -22° 7.6°C 0.13mm 0.06kPa 24135m 14m/s 5.8m/s
Thu, Apr 16 Sunrise 06:11 Sunset 20:04
24:00
59% 6.8°C 0mm 96% 0cm -27° 7.4°C 0.13mm 0.04kPa 24135m 14m/s 5.9m/s
01:00
44% 7°C 0mm 96% 0cm -28° 7.6°C 0.13mm 0.04kPa 24135m 14m/s 5.9m/s
02:00
30% 7.2°C 0mm 96% 0cm -27° 7.7°C 0mm 0.04kPa 24134m 13m/s 5.8m/s
03:00
16% 7.4°C 0mm 96% 0cm -24° 8.1°C 0mm 0.05kPa 24134m 13m/s 5.8m/s
04:00
2% 7.2°C 0mm 95% 0cm -18° 7.9°C 0mm 0.05kPa 24135m 12m/s 5.4m/s
05:00
2% 6.9°C 0mm 95% 0cm -11° 7.8°C 0mm 0.06kPa 24135m 11m/s 4.8m/s
06:00
3% 6.7°C 0mm 95% 0cm -2° 7.4°C 0mm 0.05kPa 24135m 11m/s 4.6m/s
07:00
3% 6.6°C 0mm 96% 0cm 7.2°C 0mm 0.04kPa 24135m 10m/s 4.3m/s
08:00
13% 7.3°C 0mm 94% 0cm 16° 8.3°C 0mm 0.07kPa 24135m 9.6m/s 4.7m/s
09:00
23% 7.4°C 0mm 87% 0cm 25° 9.5°C 0mm 0.15kPa 24134m 8.9m/s 5.4m/s
10:00
33% 7.2°C 0mm 79% 0cm 34° 11°C 0mm 0.27kPa 24134m 8m/s 5.7m/s
11:00
27% 7.1°C 0mm 74% 0cm 41° 12°C 0mm 0.36kPa 24134m 7.6m/s 5.6m/s
12:00
20% 7°C 0mm 68% 0cm 46° 13°C 0.06mm 0.47kPa 24134m 7.8m/s 5.7m/s
13:00
14% 6.9°C 0mm 64% 0cm 48° 14°C 0.13mm 0.57kPa 24135m 8.3m/s 6.2m/s
14:00
10% 6.9°C 0mm 62% 0cm 47° 14°C 0.06mm 0.61kPa 24134m 8.1m/s 6m/s
15:00
6% 6.8°C 0mm 62% 0cm 43° 14°C 0.06mm 0.61kPa 24134m 8.4m/s 5.9m/s
16:00
2% 7.1°C 0mm 64% 0cm 36° 14°C 0.06mm 0.57kPa 24134m 7.8m/s 5.4m/s
17:00
1% 8.4°C 0mm 71% 0cm 27° 13°C 0.06mm 0.44kPa 24134m 6.1m/s 4m/s
18:00
1% 8.8°C 0mm 78% 0cm 18° 13°C 0.13mm 0.33kPa 24135m 5.2m/s 3.2m/s
19:00
0% 8.8°C 0.01mm 83% 0cm 9.3° 12°C 0.19mm 0.23kPa 24134m 4.5m/s 2.5m/s
20:00
0% 8.1°C 0mm 87% 0cm 0.55° 10°C 0mm 0.16kPa 24135m 2.9m/s 2.3m/s
21:00
0% 8°C 0mm 92% 0cm -8.4° 9.3°C 0mm 0.09kPa 24134m 4.1m/s 2.6m/s
22:00
0% 7.9°C 0mm 96% 0cm -16° 8.6°C 0mm 0.05kPa 24135m 6.4m/s 2.9m/s
23:00
0% 7.5°C 0mm 96% 0cm -22° 8.1°C 0mm 0.04kPa 24135m 7.3m/s 2.9m/s
Fri, Apr 17 Sunrise 06:09 Sunset 20:05
24:00
0% 7.3°C 0.01mm 95% 0cm -26° 8.1°C 0mm 0.05kPa 24134m 8.4m/s 3.1m/s
01:00
0% 7.3°C 0.04mm 95% 0cm -28° 8.1°C 0mm 0.05kPa 24135m 8.3m/s 3.1m/s
02:00
2% 7.7°C 0.03mm 90% 0cm -27° 9.3°C 0mm 0.12kPa 24135m 8.4m/s 4m/s
03:00
3% 8.1°C 0.01mm 85% 0cm -23° 11°C 0mm 0.2kPa 24135m 8.6m/s 4.9m/s
04:00
5% 8.3°C 0mm 79% 0cm -17° 12°C 0mm 0.28kPa 24135m 8.7m/s 5.8m/s
05:00
4% 8.5°C 0.003mm 76% 0cm -10° 13°C 0.04mm 0.35kPa 24135m 8.3m/s 5.8m/s
06:00
2% 8.7°C 0.007mm 73% 0cm -1.7° 13°C 0.08mm 0.42kPa 24135m 7.9m/s 5.7m/s
07:00
1% 8.8°C 0.01mm 70% 0cm 7.3° 14°C 0.13mm 0.49kPa 24135m 7.5m/s 5.7m/s
08:00
1% 9.3°C 0.007mm 72% 0cm 16° 14°C 0.15mm 0.46kPa 22048m 7.6m/s 5.8m/s
09:00
1% 9.7°C 0.003mm 74% 0cm 26° 14°C 0.17mm 0.43kPa 19960m 7.8m/s 5.9m/s
10:00
1% 10°C 0mm 76% 0cm 34° 14°C 0.19mm 0.4kPa 17873m 7.9m/s 6m/s
11:00
1% 10°C 0mm 80% 0cm 41° 14°C 0.25mm 0.3kPa 19960m 8.6m/s 5.4m/s
12:00
0% 10°C 0mm 85% 0cm 47° 13°C 0.31mm 0.22kPa 22048m 9.3m/s 4.9m/s
13:00
0% 10°C 0mm 90% 0cm 49° 12°C 0.38mm 0.14kPa 24135m 10m/s 4.3m/s
14:00
0% 9.7°C 0mm 92% 0cm 47° 11°C 0.27mm 0.11kPa 24135m 10m/s 4.5m/s
15:00
0% 9.2°C 0mm 93% 0cm 43° 10°C 0.17mm 0.08kPa 24135m 11m/s 4.7m/s
16:00
0% 8.8°C 0mm 95% 0cm 36° 9.5°C 0.06mm 0.06kPa 24135m 11m/s 4.9m/s
17:00
0% 8.4°C 0mm 94% 0cm 28° 9.3°C 0.08mm 0.07kPa 24135m 11m/s 4.7m/s
18:00
0% 8°C 0mm 93% 0cm 19° 9.2°C 0.1mm 0.08kPa 24135m 11m/s 4.6m/s
19:00
0% 7.7°C 0mm 92% 0cm 9.5° 9°C 0.13mm 0.1kPa 24135m 11m/s 4.5m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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