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Rule Blue Hour

Blue Hour Forecast for Kurjenrahka, Southern Finland

Turku, Southwest Finland, Finland

Kurjenrahka’s raised bog has open sedge flats, dark pools, boardwalk lines, and sparse pines that stand clearly against mist and frost.

Currently

Real-time conditions
Cloud Cover5%
Moon Altitude2.3°

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki
blue-hour weather icon
Next opportunity
Good Blue Hour (clear) at Sunrise
Kurjenrahka
Tomorrow · 03:08–03:45 · 1h window
Medium confidence
67%
🌉Blue Hour Quality67.9%
Cloud Cover: 5%
Moon Illumination: 6%
Moon Altitude: -12.1°
blue-hour weather icon
Good Blue Hour (clear) at Sunrise
Kurjenrahka
Fri, Jul 17 · 03:12–03:48
🌉Blue Hour Quality:70%
Medium

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Blue Hour conditions across Southern Finland. The requirements and hourly values below show how those signals apply at Kurjenrahka.

Explore Blue Hour conditions across Southern Finland →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Kurjenrahka during the last 365 days.

Last 30 days
22
recorded matching windows · 70% average confidence
Last 90 days
76
recorded matching windows · 74% average confidence
Last 365 days
102
recorded matching windows · 74% average confidence
Most frequent recorded start hour

05:00 local time, shared by 18 of 102 matches recorded in the last 365 days.

Most represented month

April, with 43 of 102 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
3matching hours in the next 95 hoursJump to next match
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Blue Hour
Any
Blue Hour Quality
≥ 65.0%
Precipitation Chance
≤ 15.0%
Tue, Jul 14
22:0027%0%
23:0055%0%
Wed, Jul 15
24:0074%0%
01:0067%0%
02:0067%0%
03:0071%0%
04:0041%0%
05:0024%0%
06:0029%0%
07:0024%0%
08:0026%0%
09:0026%0%
10:0028%0%
11:0028%0%
12:0028%0%
13:0027%0%
14:0027%0%
15:0027%0%
16:0027%0%
17:0027%0%
18:0027%0%
19:0028%0%
20:0027%0%
21:0026%0%
22:0030%0%
23:0054%0%
Thu, Jul 16
24:0072%0%
01:0063%0%
02:0060%0%
03:0068%0%
04:0067%0%
05:0025%0%
06:0025%0%
07:0028%0%
08:0027%0%
09:0027%0%
10:0028%0%
11:0031%0%
12:0031%0%
13:0028%0%
14:0028%0%
15:0028%0%
16:0028%0%
17:0028%0%
18:0031%0%
19:0028%0%
20:0031%0%
21:0026%0%
22:0024%0%
23:0048%0%
Fri, Jul 17
24:0072%0%
01:0066%0%
02:0052%0%
03:0070%0%
04:0066%0%
05:0027%0%
06:0027%0%
07:0025%0%
08:0027%0%
09:0027%0%
10:0027%0%
11:0027%0%
12:0028%0%
13:0028%0%
14:0031%0%
15:0028%0%
16:0027%0%
17:0026%0%
18:0026%0%
19:0026%0%
20:0029%0%
21:0024%0%
22:0024%17%
23:0061%33%
Sat, Jul 18
24:0045%50%
01:0039%52%
02:0039%55%
03:0050%57%
04:0031%58%
05:001.7%58%
06:001.2%59%
07:001.2%64%
08:001.2%70%
09:001.2%75%
10:000.9%70%
11:000.8%64%
12:000.8%59%
13:000.9%65%
14:000.9%71%
15:001%77%
16:001.4%74%
17:001.2%72%
18:000.6%70%
19:000.8%72%
20:001.1%74%
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Blue Hour Quality 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/Helsinki
Blue Hour
High Clouds
%
Low Clouds
%
Mid-Level Clouds
%
Relative Humidity
%
Solar Elevation
°
Total Cloud Coverage
%
Visibility
m
Wind Speed
m/s
Wed, Jul 15 Sunrise 04:30 Sunset 22:41
23:00
- 5% 0% 0% 82% -2° 5% 24135m 2.5m/s
Thu, Jul 16 Sunrise 04:30 Sunset 22:41
24:00
- 5% 0% 0% 85% -5.7° 5% 24135m 2.5m/s
01:00
- 5% 0% 0% 86% -7.8° 5% 24134m 2.3m/s
02:00
- 10% 0% 0% 86% -8° 10% 24135m 1.8m/s
03:00
- 5% 0% 0% 86% -6.4° 5% 24134m 1.6m/s
04:00
- 5% 0% 0% 87% -3.1° 5% 24135m 1.5m/s
05:00
- 5% 0% 0% 86% 1.8° 5% 24134m 1.4m/s
06:00
- 0% 0% 0% 82% 7.5° 0% 24134m 1.6m/s
07:00
- 5% 0% 0% 74% 14° 5% 24135m 1.7m/s
08:00
- 5% 0% 0% 66% 21° 5% 24134m 2m/s
09:00
- 5% 0% 0% 58% 29° 5% 24135m 2.1m/s
10:00
- 5% 0% 0% 50% 36° 5% 24135m 1.9m/s
11:00
- 5% 0% 0% 43% 42° 5% 24134m 1.6m/s
12:00
- 5% 0% 0% 38% 47° 5% 24134m 0.89m/s
13:00
- 5% 0% 0% 38% 50° 5% 24135m 0.51m/s
14:00
- 5% 0% 0% 40% 51° 5% 24135m 2m/s
15:00
- 5% 0% 0% 43% 48° 5% 24134m 3.2m/s
16:00
- 5% 0% 0% 49% 44° 5% 24134m 4.3m/s
17:00
- 5% 0% 0% 56% 37° 5% 24135m 4.1m/s
18:00
- 5% 0% 0% 58% 30° 5% 24135m 3.1m/s
19:00
- 57% 0% 0% 60% 23° 57% 24135m 3m/s
20:00
- 21% 0% 0% 67% 16° 21% 24135m 3m/s
21:00
- 94% 0% 0% 77% 8.9° 94% 24135m 2.4m/s
22:00
- 91% 0% 0% 84% 2.9° 91% 24134m 2.2m/s
23:00
- 8% 0% 0% 88% -2.2° 8% 24134m 2.4m/s
Fri, Jul 17 Sunrise 04:32 Sunset 22:40
24:00
- 5% 0% 0% 90% -5.9° 5% 24134m 2.4m/s
01:00
- 5% 0% 0% 90% -7.9° 5% 24134m 2.5m/s
02:00
- 5% 0% 0% 90% -8.1° 5% 24135m 2.6m/s
03:00
- 5% 0% 0% 90% -6.6° 5% 24135m 2.7m/s
04:00
- 5% 0% 0% 89% -3.2° 5% 24135m 2.6m/s
05:00
- 5% 0% 0% 89% 1.7° 5% 24135m 2.4m/s
06:00
- 5% 0% 0% 87% 7.3° 5% 24135m 2.3m/s
07:00
- 5% 0% 0% 79% 14° 5% 24135m 2.4m/s
08:00
- 5% 0% 0% 68% 21° 5% 24135m 3.1m/s
09:00
- 3% 0% 5% 61% 29° 5% 24134m 3.4m/s
10:00
- 5% 0% 5% 58% 36° 5% 24135m 3.4m/s
11:00
- 5% 0% 5% 54% 42° 5% 24135m 3.7m/s
12:00
- 5% 0% 5% 52% 47° 5% 24135m 4.3m/s
13:00
- 5% 0% 20% 49% 50° 20% 24134m 4.7m/s
14:00
- 5% 0% 5% 51% 51° 5% 24135m 4.9m/s
15:00
- 27% 0% 6% 50% 48° 27% 24135m 4.8m/s
16:00
- 100% 0% 5% 51% 43° 100% 24135m 5.2m/s
17:00
- 100% 0% 0% 55% 37° 100% 24135m 4.8m/s
18:00
- 100% 0% 0% 60% 30° 100% 24135m 4.6m/s
19:00
- 68% 0% 15% 64% 23° 68% 24134m 4.6m/s
20:00
- 11% 0% 0% 68% 16° 11% 24134m 4.2m/s
21:00
- 87% 0% 2% 74% 8.8° 87% 24135m 3.8m/s
22:00
- 83% 0% 5% 79% 2.8° 83% 24135m 3.9m/s
23:00
- 9% 0% 5% 81% -2.3° 9% 24134m 4.1m/s
Sat, Jul 18 Sunrise 04:34 Sunset 22:38
24:00
- 100% 0% 0% 88% -6.1° 100% 24134m 4.2m/s
01:00
- 84% 0% 4% 91% -8.1° 84% 24134m 4m/s
02:00
- 100% 0% 0% 93% -8.3° 100% 24135m 3.9m/s
03:00
- 100% 0% 2% 93% -6.7° 100% 24134m 3.6m/s
04:00
- 100% 23% 34% 94% -3.4° 100% 24134m 3.1m/s
05:00
- 100% 45% 67% 96% 1.5° 100% 24135m 2.6m/s
06:00
- 100% 67% 100% 97% 7.2° 100% 24135m 2.1m/s
07:00
- 100% 78% 100% 94% 14° 100% 23284m 2.7m/s
08:00
- 100% 89% 100% 92% 21° 100% 22433m 3.2m/s
09:00
- 100% 100% 100% 89% 28° 100% 21582m 3.8m/s
10:00
- 67% 100% 68% 91% 36° 100% 18281m 4.2m/s
11:00
- 35% 100% 37% 93% 42° 100% 14981m 4.6m/s
12:00
- 2% 100% 5% 95% 47° 100% 11680m 5.1m/s
13:00
- 35% 100% 35% 93% 50° 100% 15831m 5.4m/s
14:00
- 67% 100% 65% 92% 50° 100% 19983m 5.7m/s
15:00
- 100% 100% 95% 91% 48° 100% 24135m 6m/s
16:00
- 100% 99% 97% 93% 43° 100% 16558m 5.2m/s
17:00
- 100% 99% 98% 96% 37° 100% 8981m 4.4m/s
18:00
- 100% 98% 100% 98% 30° 100% 1405m 3.7m/s
19:00
- 67% 99% 68% 98% 23° 100% 8981m 3.6m/s
20:00
- 34% 99% 35% 98% 15° 100% 16558m 3.5m/s
21:00
- 1% 99% 2% 98% 8.6° 99% 24135m 3.4m/s
22:00
- 1% 100% 2% 95% 2.7° 100% 24135m 4.3m/s
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

Forecast generated

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