Scotland, United Kingdom
Northern lights in Grangemouth
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
Grangemouth sits at 56.01N 3.72W in Scotland, United Kingdom. The IGRF-14 centered dipole puts Grangemouth at 58.3 degrees geomagnetic latitude, 2.3 degrees closer to the magnetic pole than its map latitude suggests. Grangemouth sits at 58.3 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 4, 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 Falkirk (4 km), Livingston (17 km), Dunfermline (18 km). Falkirk sits 0.0 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 Grangemouth has some civil darkness; the shortest month sample still has 4.1 hours. Every evening of the year at Grangemouth clears Glow's dark-season bar of 4 hours of civil night between 18:00 and 06:00. Grangemouth's longest night of the year, Dec 21, has 15 h 21 min of civil night.
Solar midnight at Grangemouth, when the sun is lowest, falls at 00:10 on local clocks on December 15 and 01:15 on June 15. That is 10 min after midnight in December and 1 h 15 min after midnight in June, the gap set by daylight saving and the equation of time. So at Grangemouth 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 | 14.8 h | 11.7 h | 82% | 2.7 h | |
| Feb | 12.9 h | 10.0 h | 80% | 2.6 h | |
| Mar | 10.8 h | 7.8 h | 79% | 2.3 h | |
| Apr | 8.3 h | 4.4 h | 77% | 1.9 h | |
| May | 5.8 h | 0.0 h | 75% | 1.4 h | |
| Jun | 4.1 h | 0.0 h | 84% | 0.7 h | |
| Jul | 5.0 h | 0.0 h | 81% | 0.9 h | |
| Aug | 7.3 h | 2.5 h | 80% | 1.5 h | |
| Sep | 9.9 h | 6.7 h | 78% | 2.2 h | |
| Oct | 12.2 h | 9.3 h | 80% | 2.4 h | |
| Nov | 14.2 h | 11.3 h | 80% | 2.8 hbest | |
| Dec | 15.3 h | 12.2 h | 82% | 2.8 h |
By the 15th-of-the-month sample, December is the darkest month at Grangemouth with 15.3 hours of civil night and June the lightest at 4.1. Across the year Grangemouth gets 3,664 hours of civil night. Astronomical night at Grangemouth, the sun 18 degrees or more below the horizon, lasts 12.2 hours on December 15.
NASA POWER's 2001 to 2020 all-hours climatology puts mean cloud amount for the 1 degree cell around Grangemouth at 80% across the year, from 75% in May to 84% in June. In the months with at least 4 hours of civil night Grangemouth averages 80%, against a median of 77% for Glow towns in United Kingdom.
Multiplying civil night by the clear share of the sky gives November the best score, 2.8 hours, ahead of December at 2.8. Grangemouth's equinox months score 2.3 in March and 2.2 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 4 or more, the level that puts the average oval edge over Grangemouth, on 24% of days. At Grangemouth's level the share runs from 19% in December to 31% in September, 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 4. 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 Grangemouth have at least 2 moon-free dark hours inside 10 PM to 2 AM, and Oct 6 has the most at 4 h. Tonight Grangemouth has 11 h 13 min of civil night, 1 h 41 min of it with the moon down.
- 2
57% lit
1.7 h
- 3
46% lit
3.1 h
- 4
34% lit
4.7 h
- 5
24% lit
6.3 h
- 6
15% lit
7.9 h
- 7
8% lit
9.4 h
- 8
3% lit
10.9 h
- 9
1% lit
11.8 h
- 10
0% lit
11.8 h
- 11
2% lit
11.9 h
- 12
6% lit
12.0 h
- 13
11% lit
12.1 h
- 14
18% lit
12.1 h
- 15
26% lit
11.7 h
- 16
34% lit
10.8 h
- 17
43% lit
9.7 h
- 18
53% lit
8.4 h
- 19
62% lit
7.1 h
- 20
72% lit
5.8 h
- 21
80% lit
4.4 h
- 22
88% lit
3.0 h
- 23
94% lit
1.7 h
- 24
98% lit
0.2 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
0.6 h
- 30
71% lit
1.9 h
- 31
60% lit
3.5 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 27 Glow towns in Scotland, Grangemouth ranks 18th by dipole latitude against a regional median of 58.3 degrees; Isle of Lewis sits highest at 60.8. Among the 106 Glow towns in United Kingdom, Grangemouth ranks 18th by dipole latitude against a national median of 56.3 degrees; Isle of Lewis sits highest at 60.8. On December 15 Grangemouth gets 15.3 hours of civil night, 11th longest of 106 in United Kingdom, where the median is 15.0.
Questions
- Can you see the northern lights in Grangemouth?
- Grangemouth sits at 58.3 degrees geomagnetic. By SWPC's rule the average oval edge is overhead at Kp 4, and aurora is usually visible on the northern horizon at G1 (Kp 5) or less. Clear, dark sky over Grangemouth still decides it.
- When is it dark enough in Grangemouth?
- Every night at Grangemouth has civil darkness. Tonight has 11 h 13 min, and December 15 has 15.3 hours.
- What is the best month for aurora in Grangemouth?
- November, by civil night at Grangemouth times the clear share of the sky from NASA POWER's 2001 to 2020 average.
- How cloudy is Grangemouth in the dark months?
- About 80% mean cloud amount over Grangemouth 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 Grangemouth?
- A 3-hour Kp of 4 or more, the level that puts the average oval edge overhead, occurred on 24% of days from 1996 to 2025 in the GFZ Potsdam record.
- Why does this page point to Falkirk?
- Grangemouth sits within 15 km of Falkirk with the same rounded dipole latitude, Kp and dark season, so Glow treats Falkirk as the main page for both.
Nearby and related
Nearest Glow towns
Grangemouth by month
Region and comparisons