Can you see the northern lights in Hillsboro in June?

On dark, clear nights with enough activity. 30 of 30 nights at Hillsboro have civil darkness, and 0% of past June days reached Kp 8.

How dark is Hillsboro in June?

Hillsboro averages 7.0 hours of civil night a night in June 2027, from 7 h 11 min on the 1st to 6 h 59 min on the last night.

How cloudy is Hillsboro in June?

NASA POWER's 2001 to 2020 climatology gives Hillsboro's 1 degree cell 62% mean cloud in June, against 65% for the whole year. It is an all-hours average, not a forecast.

What is the best night in June 2027 for aurora in Hillsboro?

By darkness and moon alone, Jun 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Hillsboro. Activity on that date will only be known hours ahead.

Is June or July better in Hillsboro?

By civil night times the clear share, June scores 2.6 hours at Hillsboro and July 4.5. July comes out ahead.

Hillsboro · June 2027

Northern lights in Hillsboro in June 2027

Answer

June gives Hillsboro 6.9 hours of civil night on the 15th, the lightest month of its year, under 62% mean cloud. 0% of June days since 1996 reached Kp 8, enough for the oval edge to reach Hillsboro.

7.0 h

civil night, average night

SunCalc for 45.52, -122.99; NASA POWER; GFZ Kp

June against the rest of the year

2.9

3.1

2.4

2.3

2.5

2.6

4.5

5.2

5.5

4.4

3.1

2.7

June cloud at Hillsboro averages 62% in NASA POWER's 2001 to 2020 record, 3 points clearer than its yearly mean. July is Hillsboro's clearest month at 39%. By civil night times clear sky, June scores 2.6 hours at Hillsboro, 9th of 12. Seattle, 237 km away, averages 68%, cloudier by 6 points.

Civil night at Hillsboro starts June at 7 h 11 min and reaches 6 h 59 min by June 30, 0.2 hours shorter. SWPC's 10 PM to 2 AM window is fully dark on every night. True astronomical darkness, the sun 18 degrees down, lasts 2.8 hours on the 15th.

June night by night

June opens toward a new moon on Jun 4, with full moon on Jun 18, in America/Los_Angeles dates. Hillsboro gets 98 hours of civil night with the moon below the horizon across the month. The best of them for moon-free darkness inside 10 PM to 2 AM: Jun 1 (4 h), Jun 2 (4 h), Jun 3 (4 h).

1
9% lit
5.9 h
2
3% lit
6.5 h
3
1% lit
7.1 h
4
0% lit
7.1 h
New
5
3% lit
6.2 h
6
9% lit
5.3 h
7
17% lit
4.7 h
8
26% lit
4.2 h
9
37% lit
3.8 h
10
48% lit
3.5 h
11
59% lit
3.1 h
12
70% lit
2.8 h
13
79% lit
2.5 h
14
87% lit
2.0 h
15
93% lit
1.5 h
16
97% lit
0.9 h
17
99% lit
0.1 h
18
100% lit
0.0 h
Full
19
98% lit
0.4 h
20
95% lit
1.0 h
21
91% lit
1.4 h
22
84% lit
1.8 h
23
77% lit
2.1 h
24
69% lit
2.4 h
25
59% lit
2.7 h
26
49% lit
3.0 h
27
39% lit
3.3 h
28
29% lit
3.7 h
29
20% lit
4.2 h
30
11% lit
4.8 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.

Activity in past Junes

Hillsboro needs Kp 8 for the average oval edge to sit overhead. 1 of the 900 June days from 1996 to 2025 (0%) reached it in the GFZ Potsdam record, one of the three quietest months for that level; storm days with Kp 5 or more made up 8%. Hillsboro sits at 50.9 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 8.

June across United States

Hillsboro ranks 4th in United States for civil night on June 15, behind Buffalo at 7.4 hours. Coming from May (7.8 hours at Hillsboro), June loses darkness, and the nights keep growing into July (7.4 hours on the 15th). The June solstice falls on June 21, 07:07 Hillsboro time.

Civil night on June 15 and June cloud, month-page towns in United States
Town	Civil night	Cloud
Buffalo	7.4 h	61%
Portland, Maine	7.3 h	62%
Minneapolis	7.0 h	58%
Hillsboro	6.9 h	62%
Duluth	6.7 h	61%
Fargo	6.7 h	57%
Seattle	6.5 h	68%
Juneau	2.8 h	81%
Anchorage	0.0 h	81%
Fairbanks	0.0 h	73%
Eagle River	0.0 h	81%

Darkness and moon, every night

Hillsboro, June 2027: each night from local noon to the next noon
Night	Civil	Astronomical	Moon-free dark	Moon-free, 10 PM to 2 AM	Moon lit
Tue Jun 1	7 h 11 min	3 h 23 min	5 h 56 min	4 h	9%
Wed Jun 2	7 h 10 min	3 h 20 min	6 h 30 min	4 h	3%
Thu Jun 3	7 h 8 min	3 h 16 min	7 h 8 min	4 h	1%
Fri Jun 4	7 h 7 min	3 h 13 min	7 h 7 min	4 h	0%
Sat Jun 5	7 h 5 min	3 h 10 min	6 h 9 min	3 h 26 min	3%
Sun Jun 6	7 h 4 min	3 h 7 min	5 h 20 min	2 h 37 min	9%
Mon Jun 7	7 h 3 min	3 h 5 min	4 h 43 min	2 h 1 min	17%
Tue Jun 8	7 h 2 min	3 h 2 min	4 h 14 min	1 h 32 min	26%
Wed Jun 9	7 h 1 min	3 h	3 h 50 min	1 h 9 min	37%
Thu Jun 10	7 h	2 h 58 min	3 h 29 min	48 min	48%
Fri Jun 11	6 h 59 min	2 h 56 min	3 h 9 min	28 min	59%
Sat Jun 12	6 h 58 min	2 h 54 min	2 h 49 min	8 min	70%
Sun Jun 13	6 h 58 min	2 h 52 min	2 h 27 min	0 min	79%
Mon Jun 14	6 h 57 min	2 h 51 min	2 h 1 min	0 min	87%
Tue Jun 15	6 h 56 min	2 h 50 min	1 h 30 min	0 min	93%
Wed Jun 16	6 h 56 min	2 h 48 min	52 min	0 min	97%
Thu Jun 17	6 h 56 min	2 h 48 min	5 min	0 min	99%
Fri Jun 18	6 h 55 min	2 h 47 min	0 min	0 min	100%
Sat Jun 19	6 h 55 min	2 h 47 min	25 min	11 min	98%
Sun Jun 20	6 h 55 min	2 h 47 min	58 min	44 min	95%
Mon Jun 21	6 h 55 min	2 h 47 min	1 h 25 min	1 h 11 min	91%
Tue Jun 22	6 h 55 min	2 h 47 min	1 h 47 min	1 h 34 min	84%
Wed Jun 23	6 h 56 min	2 h 47 min	2 h 6 min	1 h 53 min	77%
Thu Jun 24	6 h 56 min	2 h 48 min	2 h 24 min	2 h 10 min	69%
Fri Jun 25	6 h 56 min	2 h 49 min	2 h 41 min	2 h 27 min	59%
Sat Jun 26	6 h 57 min	2 h 50 min	2 h 58 min	2 h 45 min	49%
Sun Jun 27	6 h 57 min	2 h 51 min	3 h 18 min	3 h 5 min	39%
Mon Jun 28	6 h 58 min	2 h 53 min	3 h 42 min	3 h 28 min	29%
Tue Jun 29	6 h 59 min	2 h 55 min	4 h 12 min	3 h 58 min	20%
Wed Jun 30	6 h 59 min	2 h 57 min	4 h 51 min	4 h	11%

Moon lit: SunCalc illuminated fraction at the middle of the 10 PM to 2 AM window.

Questions

Can you see the northern lights in Hillsboro in June?: On dark, clear nights with enough activity. 30 of 30 nights at Hillsboro have civil darkness, and 0% of past June days reached Kp 8.
How dark is Hillsboro in June?: Hillsboro averages 7.0 hours of civil night a night in June 2027, from 7 h 11 min on the 1st to 6 h 59 min on the last night.
How cloudy is Hillsboro in June?: NASA POWER's 2001 to 2020 climatology gives Hillsboro's 1 degree cell 62% mean cloud in June, against 65% for the whole year. It is an all-hours average, not a forecast.
What is the best night in June 2027 for aurora in Hillsboro?: By darkness and moon alone, Jun 1, with 4 h of moon-free darkness inside 10 PM to 2 AM at Hillsboro. Activity on that date will only be known hours ahead.
Is June or July better in Hillsboro?: By civil night times the clear share, June scores 2.6 hours at Hillsboro and July 4.5. July comes out ahead.

Sources and verification

SunCalchttps://github.com/mourner/suncalc
NASA POWER climatologyhttps://power.larc.nasa.gov/docs/services/api/temporal/climatology/
GFZ Potsdam Kp indexhttps://kp.gfz.de/en/data
NOAA SWPC, Tips on viewing the aurorahttps://www.spaceweather.gov/content/tips-viewing-aurora

Quoted figures last checked against their sources on 2026-09-30; next review 2026-12-31. Computed figures come from SunCalc and the IGRF-14 dipole as described in the methodology. Every quote is listed in the sources ledger.