England, United Kingdom
Northern lights in Great Sankey
Answer
Tonight
Waiting on darkness
It is not civil-dark yet. The next dusk is listed below.
Observed 11:55 UTC, forecast 13:26 UTC, 91 min lead
Clock times in Europe/London
Storm level needed
Great Sankey sits at 53.39N 2.64W in England, United Kingdom. The IGRF-14 centered dipole puts Great Sankey at 55.6 degrees geomagnetic latitude, 2.2 degrees closer to the magnetic pole than its map latitude suggests. Great Sankey sits at 55.6 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 6, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less.
"aurora is commonly visible at high latitudes (northern Michigan and Maine)"
The nearest other Glow towns are St Helens (9 km), Northwich (17 km), Liverpool (22 km). St Helens sits 0.1 degrees higher on the dipole and needs the same Kp.
Approximate: SWPC calls its Kp to latitude rule an average, and a centered dipole can differ by a degree from fuller field models. How the storm level is matched
The year in darkness
Every night of 2026 at Great Sankey has some civil darkness; the shortest month sample still has 5.1 hours. Every evening of the year at Great Sankey clears Glow's dark-season bar of 4 hours of civil night between 18:00 and 06:00. Great Sankey's longest night of the year, Dec 19, has 14 h 58 min of civil night.
Solar midnight at Great Sankey, when the sun is lowest, falls at 00:06 on local clocks on December 15 and 01:11 on June 15. That is 6 min after midnight in December and 1 h 11 min after midnight in June, the gap set by daylight saving and the equation of time. So at Great Sankey the darkest hour sits near the middle of SWPC's 10 PM to 2 AM window in winter.
Month by month
| Month | Night | Civil | Cloud | Clear dark | |
|---|---|---|---|---|---|
| Jan | 14.4 h | 11.6 h | 82% | 2.6 h | |
| Feb | 12.8 h | 10.1 h | 79% | 2.7 hbest | |
| Mar | 10.9 h | 8.1 h | 76% | 2.6 h | |
| Apr | 8.6 h | 5.2 h | 73% | 2.3 h | |
| May | 6.4 h | 0.0 h | 72% | 1.8 h | |
| Jun | 5.1 h | 0.0 h | 75% | 1.3 h | |
| Jul | 5.7 h | 0.0 h | 75% | 1.4 h | |
| Aug | 7.8 h | 3.8 h | 77% | 1.8 h | |
| Sep | 10.0 h | 7.1 h | 75% | 2.5 h | |
| Oct | 12.1 h | 9.4 h | 78% | 2.7 h | |
| Nov | 14.0 h | 11.2 h | 81% | 2.7 h | |
| Dec | 14.9 h | 12.0 h | 82% | 2.7 h |
By the 15th-of-the-month sample, December is the darkest month at Great Sankey with 14.9 hours of civil night and June the lightest at 5.1. Across the year Great Sankey gets 3,732 hours of civil night. Astronomical night at Great Sankey, the sun 18 degrees or more below the horizon, lasts 12.0 hours on December 15.
NASA POWER's 2001 to 2020 all-hours climatology puts mean cloud amount for the 1 degree cell around Great Sankey at 77% across the year, from 72% in May to 82% in January. In the months with at least 4 hours of civil night Great Sankey averages 77%, against a median of 77% for Glow towns in United Kingdom.
Multiplying civil night by the clear share of the sky gives February the best score, 2.7 hours, ahead of December at 2.7. Great Sankey's equinox months score 2.6 in March and 2.5 in September, the weeks SWPC links with larger storms.
Kp history
From 1996 to 2025, the GFZ Potsdam record shows a 3-hour Kp of 6 or more, the level that puts the average oval edge over Great Sankey, on 3% of days. At Great Sankey's level the share runs from 1% in December to 5% in October, while storm days with Kp 5 or more made up 10%.
Share of UTC days in each calendar month whose highest 3-hour Kp reached Kp 6. Kp history by year
Moon, next 30 nights
Over the 30 nights from Oct 2, the new moon falls on Oct 10 and the full moon on Oct 26, in Europe/London dates. 15 of the 30 nights at Great Sankey have at least 2 moon-free dark hours inside 10 PM to 2 AM, and Oct 6 has the most at 4 h. Tonight Great Sankey has 11 h 15 min of civil night, 2 h 7 min of it with the moon down.
- 2
57% lit
2.1 h
- 3
46% lit
3.5 h
- 4
34% lit
5.0 h
- 5
24% lit
6.5 h
- 6
15% lit
8.0 h
- 7
8% lit
9.4 h
- 8
3% lit
10.9 h
- 9
1% lit
11.7 h
- 10
0% lit
11.8 h
- 11
2% lit
11.9 h
- 12
6% lit
11.9 h
- 13
11% lit
12.0 h
- 14
18% lit
11.9 h
- 15
26% lit
11.2 h
- 16
34% lit
10.3 h
- 17
43% lit
9.3 h
- 18
53% lit
8.1 h
- 19
62% lit
6.8 h
- 20
72% lit
5.5 h
- 21
80% lit
4.3 h
- 22
88% lit
3.0 h
- 23
94% lit
1.6 h
- 24
98% lit
0.3 h
- 25
100% lit
0.0 h
- 26
99% lit
0.0 h
- 27
95% lit
0.0 h
- 28
89% lit
0.0 h
- 29
81% lit
1.0 h
- 30
71% lit
2.2 h
- 31
60% lit
3.7 h
Each cell is the night that starts on that date. Hours are civil-dark time with the moon below the horizon; the green rule scales with them. Green outline: new moon. Bone outline: full moon.
Within United Kingdom
Among the 63 Glow towns in England, Great Sankey ranks 39th by dipole latitude against a regional median of 55.7 degrees; Carlisle sits highest at 57.1. Among the 106 Glow towns in United Kingdom, Great Sankey ranks 80th by dipole latitude against a national median of 56.2 degrees; Isle of Lewis sits highest at 60.8. On December 15 Great Sankey gets 14.9 hours of civil night, 81st longest of 106 in United Kingdom, where the median is 15.0.
Questions
- Can you see the northern lights in Great Sankey?
- Great Sankey sits at 55.6 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 6, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less. Clear, dark sky over Great Sankey still decides it.
- When is it dark enough in Great Sankey?
- Every night at Great Sankey has civil darkness. Tonight has 11 h 15 min, and December 15 has 14.9 hours.
- What is the best month for aurora in Great Sankey?
- February, by civil night at Great Sankey times the clear share of the sky from NASA POWER's 2001 to 2020 average.
- How cloudy is Great Sankey in the dark months?
- About 77% mean cloud amount over Great Sankey in the months with at least 4 hours of civil night, from NASA POWER's 2001 to 2020 all-hours climatology.
- How often is activity high enough for Great Sankey?
- A 3-hour Kp of 6 or more, the level that puts the average oval edge overhead, occurred on 3% of days from 1996 to 2025 in the GFZ Potsdam record.
- Why does this page point to St Helens?
- Great Sankey sits within 15 km of St Helens with the same rounded dipole latitude, Kp and dark season, so Glow treats St Helens as the main page for both.
Nearby and related
Nearest Glow towns
Great Sankey by month
Region and comparisons