British Columbia, Canada
Northern lights in Chilliwack
Answer
Tonight
Darkness window open
Civil darkness has begun.
Observed 11:55 UTC, forecast 13:26 UTC, 91 min lead
Clock times in America/Vancouver
Storm level needed
Chilliwack sits at 49.17N 121.95W in British Columbia, Canada. The IGRF-14 centered dipole puts Chilliwack at 54.6 degrees geomagnetic latitude, 5.4 degrees closer to the magnetic pole than its map latitude suggests. Chilliwack sits at 54.6 degrees geomagnetic. The lowest NOAA storm level whose typical viewing latitude reaches it is G3 (Kp = 7). By SWPC's rule the average oval edge is overhead only at Kp 6.
"aurora has been seen as low as Illinois and Oregon (typically 50° geomagnetic lat.)"
The nearest other Glow towns are Abbotsford (25 km), Bellingham (60 km), Coquitlam (62 km). Abbotsford sits 0.1 degrees lower 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 Chilliwack has some civil darkness; the shortest month sample still has 6.2 hours. Every evening of the year at Chilliwack clears Glow's dark-season bar of 4 hours of civil night between 18:00 and 06:00. Chilliwack's longest night of the year, Dec 16, has 14 h 26 min of civil night.
Solar midnight at Chilliwack, when the sun is lowest, falls at 01:03 on local clocks on December 15 and 01:08 on June 15. That is 1 h 3 min after midnight in December and 1 h 8 min after midnight in June, the gap set by daylight saving and the equation of time. So at Chilliwack the darkest hour sits late in SWPC's 10 PM to 2 AM window.
Month by month
| Month | Night | Civil | Cloud | Clear dark | |
|---|---|---|---|---|---|
| Jan | 14.0 h | 11.4 h | 76% | 3.4 h | |
| Feb | 12.6 h | 10.1 h | 72% | 3.5 h | |
| Mar | 10.9 h | 8.4 h | 77% | 2.5 h | |
| Apr | 9.0 h | 6.1 h | 75% | 2.3 h | |
| May | 7.2 h | 3.2 h | 72% | 2.0 h | |
| Jun | 6.2 h | 0.0 h | 71% | 1.8 h | |
| Jul | 6.7 h | 1.8 h | 47% | 3.6 h | |
| Aug | 8.3 h | 5.2 h | 48% | 4.4 hbest | |
| Sep | 10.3 h | 7.7 h | 58% | 4.3 h | |
| Oct | 12.1 h | 9.6 h | 71% | 3.5 h | |
| Nov | 13.6 h | 11.1 h | 78% | 3.0 h | |
| Dec | 14.4 h | 11.8 h | 78% | 3.2 h |
By the 15th-of-the-month sample, December is the darkest month at Chilliwack with 14.4 hours of civil night and June the lightest at 6.2. Across the year Chilliwack gets 3,811 hours of civil night. Astronomical night at Chilliwack, the sun 18 degrees or more below the horizon, lasts 11.8 hours on December 15.
NASA POWER's 2001 to 2020 all-hours climatology puts mean cloud amount for the 1 degree cell around Chilliwack at 69% across the year, from 47% in July to 78% in November. In the months with at least 4 hours of civil night Chilliwack averages 69%, against a median of 67% for Glow towns in Canada.
Multiplying civil night by the clear share of the sky gives August the best score, 4.4 hours, ahead of September at 4.3. Chilliwack's equinox months score 2.5 in March and 4.3 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 Chilliwack, on 3% of days. At Chilliwack'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 1, the new moon falls on Oct 10 and the full moon on Oct 25, in America/Vancouver dates. 15 of the 30 nights at Chilliwack have at least 2 moon-free dark hours inside 10 PM to 2 AM, and Oct 5 has the most at 4 h. Tonight Chilliwack has 11 h 14 min of civil night, 1 h 55 min of it with the moon down.
- 1
64% lit
1.9 h
- 2
53% lit
3.0 h
- 3
42% lit
4.4 h
- 4
31% lit
5.8 h
- 5
21% lit
7.2 h
- 6
13% lit
8.6 h
- 7
6% lit
9.9 h
- 8
2% lit
11.3 h
- 9
0% lit
11.7 h
- 10
1% lit
11.8 h
- 11
3% lit
11.8 h
- 12
7% lit
11.9 h
- 13
13% lit
11.7 h
- 14
20% lit
11.1 h
- 15
28% lit
10.4 h
- 16
37% lit
9.4 h
- 17
46% lit
8.4 h
- 18
56% lit
7.3 h
- 19
65% lit
6.1 h
- 20
74% lit
4.9 h
- 21
83% lit
3.7 h
- 22
90% lit
2.5 h
- 23
95% lit
1.2 h
- 24
99% lit
0.0 h
- 25
100% lit
0.0 h
- 26
98% lit
0.0 h
- 27
94% lit
0.0 h
- 28
87% lit
0.7 h
- 29
78% lit
1.8 h
- 30
68% lit
3.0 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 Canada
Among the 19 Glow towns in British Columbia, Chilliwack ranks 12th by dipole latitude against a regional median of 55.2 degrees; Fort St. John sits highest at 61.7. Among the 130 Glow towns in Canada, Chilliwack ranks 89th by dipole latitude against a national median of 55.3 degrees; Yellowknife sits highest at 68.5. On December 15 Chilliwack gets 14.4 hours of civil night, 42nd longest of 130 in Canada, where the median is 14.2.
Questions
- Can you see the northern lights in Chilliwack?
- Chilliwack sits at 54.6 degrees geomagnetic. The lowest NOAA storm level whose typical viewing latitude reaches it is G3 (Kp = 7). By SWPC's rule the average oval edge is overhead only at Kp 6. Clear, dark sky over Chilliwack still decides it.
- When is it dark enough in Chilliwack?
- Every night at Chilliwack has civil darkness. Tonight has 11 h 14 min, and December 15 has 14.4 hours.
- What is the best month for aurora in Chilliwack?
- August, by civil night at Chilliwack times the clear share of the sky from NASA POWER's 2001 to 2020 average.
- How cloudy is Chilliwack in the dark months?
- About 69% mean cloud amount over Chilliwack 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 Chilliwack?
- 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.
Nearby and related
Nearest Glow towns
Chilliwack by month
Region and comparisons