meteokastro.gr - WU Station History

Ιστορικό Σταθμού Μεταφορτωμένο στο Weather Underground

	Ημερήσια Σύνοψη για Δεκέμβριος 21, 2018	Μονάδες: Αγγλικό Μετρικό Ολες

Ημερήσια

	Μέγιστη:	Ελάχιστη:	Μέση:
Θερμοκρασία:	48.4 °F	37.9 °F	42.1 °F
Σημείο Δρόσου:	41.2 °F	35.1 °F	37.8 °F
Υγρασία:	95%	73%	85%
Ταχύτητα Ανέμου:	4mph	0mph	0.2mph
Ριπές Ανέμου:	8mph	-	-
Ανεμος	-	-	WNW
Πίεση:	30.4 in	30.3 in	-
Υετός:	0 in

	Δεδομένα πίνακα για Δεκέμβριος 21, 2018

Ωρα	Θερμοκρ.	Σημ. Δρόσου	Πίεση	Ανεμος	Ταχ. Ανέμου	Ριπές Ανέμου	Υγρασία	Ραγδαιότητα (/ώρα)
00:00	40.8 °F	39.6 °F	30.4 in	Calm			95%	0 in
00:05	41 °F	38.3 °F	30.4 in	Calm			90%	0 in
00:10	41 °F	38.3 °F	30.4 in	Calm			90%	0 in
00:15	41 °F	38.3 °F	30.4 in	Calm			90%	0 in
00:20	41 °F	38.3 °F	30.4 in	Calm			90%	0 in
00:25	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:30	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:35	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:40	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:45	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:50	41.2 °F	38.5 °F	30.4 in	Calm			90%	0 in
00:55	41.2 °F	38.1 °F	30.4 in	Calm			89%	0 in
01:00	41.2 °F	38.1 °F	30.4 in	Calm			89%	0 in
01:05	41.2 °F	38.1 °F	30.4 in	Calm			89%	0 in
01:10	41 °F	37.9 °F	30.4 in	Calm			89%	0 in
01:15	40.8 °F	37.9 °F	30.4 in	Calm			89%	0 in
01:20	40.8 °F	37.8 °F	30.4 in	Calm			89%	0 in
01:25	40.6 °F	37.8 °F	30.4 in	Calm			89%	0 in
01:30	40.6 °F	37.6 °F	30.4 in	Calm			89%	0 in
01:35	40.5 °F	37.6 °F	30.4 in	Calm			89%	0 in
01:40	40.5 °F	37.4 °F	30.4 in	Calm			89%	0 in
01:45	40.5 °F	37.8 °F	30.4 in	Calm			90%	0 in
01:50	40.3 °F	37.6 °F	30.4 in	Calm			90%	0 in
01:55	40.3 °F	37.6 °F	30.4 in	Calm			90%	0 in
02:00	40.3 °F	37.6 °F	30.4 in	Calm			90%	0 in
02:05	40.1 °F	37.4 °F	30.4 in	Calm			90%	0 in
02:10	39.9 °F	36.9 °F	30.4 in	Calm			89%	0 in
02:15	39.7 °F	36.7 °F	30.4 in	Calm			89%	0 in
02:20	39.6 °F	36.9 °F	30.4 in	Calm			90%	0 in
02:25	39.4 °F	36.7 °F	30.4 in	Calm			90%	0 in
02:30	39.4 °F	36.7 °F	30.4 in	Calm			90%	0 in
02:35	39.2 °F	36.5 °F	30.4 in	Calm			90%	0 in
02:40	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
02:45	38.8 °F	36.1 °F	30.4 in	Calm			90%	0 in
02:50	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
02:55	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
03:00	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
03:05	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
03:10	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
03:15	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:20	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:25	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:30	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:35	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:40	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
03:45	38.8 °F	36.5 °F	30.4 in	Calm			91%	0 in
03:50	38.8 °F	36.3 °F	30.4 in	Calm			91%	0 in
03:55	38.8 °F	36.3 °F	30.4 in	Calm			91%	0 in
04:00	38.8 °F	36.3 °F	30.4 in	Calm			91%	0 in
04:05	38.8 °F	36.3 °F	30.4 in	Calm			91%	0 in
04:10	38.8 °F	36.3 °F	30.4 in	Calm			91%	0 in
04:15	38.8 °F	36.5 °F	30.4 in	Calm			91%	0 in
04:20	39 °F	36.9 °F	30.4 in	Calm			92%	0 in
04:25	39 °F	37 °F	30.4 in	Calm			92%	0 in
04:30	39 °F	36.7 °F	30.4 in	Calm			91%	0 in
04:35	39 °F	36.9 °F	30.4 in	Calm			92%	0 in
04:40	39 °F	37 °F	30.4 in	Calm			92%	0 in
04:45	39.4 °F	37.2 °F	30.4 in	ENE	1 mph	3 mph	92%	0 in
04:50	39.6 °F	37.6 °F	30.4 in	ENE	2 mph	4 mph	92%	0 in
04:55	39.7 °F	37.6 °F	30.4 in	ENE	3 mph	4 mph	92%	0 in
05:00	39.7 °F	37.8 °F	30.4 in	ENE	3 mph	4 mph	92%	0 in
05:05	39.7 °F	37.6 °F	30.4 in	North	3 mph	4 mph	92%	0 in
05:10	39.6 °F	37.2 °F	30.4 in	North	3 mph	3 mph	91%	0 in
05:15	39.6 °F	37 °F	30.4 in	North	3 mph	8 mph	91%	0 in
05:20	39.6 °F	37.2 °F	30.4 in	North	4 mph	4 mph	91%	0 in
05:25	39.6 °F	37.2 °F	30.4 in	North	4 mph	4 mph	91%	0 in
05:30	39.6 °F	37 °F	30.4 in	North	4 mph	5 mph	91%	0 in
05:35	39.6 °F	37 °F	30.4 in	North	4 mph	5 mph	91%	0 in
05:40	39.6 °F	37.2 °F	30.4 in	North	3 mph	4 mph	91%	0 in
05:45	39.7 °F	37.2 °F	30.4 in	North	3 mph	4 mph	91%	0 in
05:50	39.6 °F	37.2 °F	30.4 in	North	3 mph	5 mph	91%	0 in
05:55	39.7 °F	37.2 °F	30.4 in	NNW	3 mph	5 mph	91%	0 in
06:00	39.7 °F	37.2 °F	30.4 in	NNW	3 mph	3 mph	91%	0 in
06:05	39.6 °F	36.9 °F	30.4 in	NNW	3 mph	5 mph	90%	0 in
06:10	39.7 °F	37 °F	30.4 in	NNW	4 mph	4 mph	90%	0 in
06:15	39.7 °F	37 °F	30.4 in	NNW	4 mph	4 mph	90%	0 in
06:20	39.7 °F	37 °F	30.4 in	NNW	3 mph	5 mph	90%	0 in
06:25	39.7 °F	36.9 °F	30.4 in	NNW	2 mph	5 mph	89%	0 in
06:30	39.7 °F	36.9 °F	30.4 in	NNW	1 mph	1 mph	89%	0 in
06:35	39.7 °F	36.9 °F	30.4 in	Calm		1 mph	89%	0 in
06:40	39.7 °F	36.9 °F	30.4 in	Calm			89%	0 in
06:45	39.9 °F	36.9 °F	30.4 in	Calm			89%	0 in
06:50	39.9 °F	37 °F	30.4 in	Calm			89%	0 in
06:55	40.1 °F	37 °F	30.4 in	Calm			89%	0 in
07:00	40.3 °F	37.2 °F	30.4 in	Calm			89%	0 in
07:05	40.3 °F	36.9 °F	30.4 in	Calm			88%	0 in
07:10	40.3 °F	36.9 °F	30.4 in	Calm			88%	0 in
07:15	39.9 °F	36.7 °F	30.4 in	Calm			88%	0 in
07:20	39.6 °F	36 °F	30.4 in	Calm			87%	0 in
07:25	39.2 °F	35.8 °F	30.4 in	Calm			87%	0 in
07:30	38.8 °F	35.2 °F	30.4 in	Calm			87%	0 in
07:35	38.5 °F	35.2 °F	30.4 in	Calm			88%	0 in
07:40	38.5 °F	35.2 °F	30.4 in	Calm			88%	0 in
07:45	38.5 °F	35.2 °F	30.4 in	Calm			88%	0 in
07:50	38.5 °F	35.4 °F	30.4 in	Calm			89%	0 in
07:55	38.5 °F	35.4 °F	30.4 in	Calm			89%	0 in
08:00	38.3 °F	35.2 °F	30.4 in	Calm			89%	0 in
08:05	38.1 °F	35.2 °F	30.4 in	Calm			89%	0 in
08:10	38.1 °F	35.1 °F	30.4 in	Calm			89%	0 in
08:15	37.9 °F	35.1 °F	30.4 in	Calm			89%	0 in
08:20	37.9 °F	35.1 °F	30.4 in	Calm			89%	0 in
08:25	38.1 °F	35.4 °F	30.4 in	Calm			90%	0 in
08:30	38.3 °F	35.6 °F	30.4 in	Calm			90%	0 in
08:35	38.5 °F	35.8 °F	30.4 in	Calm			90%	0 in
08:40	38.7 °F	36 °F	30.4 in	Calm			90%	0 in
08:45	39 °F	36.3 °F	30.4 in	Calm			90%	0 in
08:50	39.4 °F	36.9 °F	30.4 in	Calm			91%	0 in
08:55	39.7 °F	37 °F	30.4 in	Calm			90%	0 in
09:00	40.1 °F	37.4 °F	30.4 in	Calm			90%	0 in
09:05	40.5 °F	37.8 °F	30.4 in	Calm			90%	0 in
09:10	40.6 °F	37.6 °F	30.4 in	Calm			89%	0 in
09:15	40.8 °F	37.9 °F	30.4 in	Calm			89%	0 in
09:20	41.2 °F	38.1 °F	30.4 in	Calm			89%	0 in
09:25	41.7 °F	38.8 °F	30.4 in	Calm			89%	0 in
09:30	41.7 °F	38.5 °F	30.4 in	Calm			88%	0 in
09:35	41.9 °F	38.7 °F	30.4 in	Calm			88%	0 in
09:40	41.9 °F	38.3 °F	30.4 in	Calm			87%	0 in
09:45	42.3 °F	38.7 °F	30.4 in	Calm			87%	0 in
09:50	42.1 °F	38.1 °F	30.4 in	Calm			86%	0 in
09:55	42.1 °F	38.1 °F	30.4 in	Calm			86%	0 in
10:00	42.1 °F	38.1 °F	30.4 in	Calm			86%	0 in
10:05	42.1 °F	38.1 °F	30.4 in	Calm			86%	0 in
10:10	41.7 °F	37.8 °F	30.4 in	Calm			86%	0 in
10:15	41.4 °F	37.8 °F	30.4 in	Calm			87%	0 in
10:20	41.4 °F	38.1 °F	30.4 in	Calm			88%	0 in
10:25	41.5 °F	38.3 °F	30.4 in	Calm			88%	0 in
10:30	41.2 °F	37.9 °F	30.4 in	Calm			88%	0 in
10:35	41.4 °F	37.9 °F	30.4 in	Calm			88%	0 in
10:40	41.4 °F	38.5 °F	30.4 in	Calm			89%	0 in
10:45	41.4 °F	38.5 °F	30.4 in	Calm			89%	0 in
10:50	41.5 °F	38.7 °F	30.4 in	Calm			89%	0 in
10:55	42.1 °F	39 °F	30.4 in	Calm			89%	0 in
11:00	43 °F	39.7 °F	30.4 in	Calm			88%	0 in
11:05	43.3 °F	39.7 °F	30.4 in	Calm			87%	0 in
11:10	43.2 °F	39.4 °F	30.4 in	Calm			86%	0 in
11:15	43.2 °F	39.4 °F	30.4 in	Calm			86%	0 in
11:20	43.7 °F	40.1 °F	30.4 in	Calm			87%	0 in
11:25	43.9 °F	39.9 °F	30.4 in	Calm			86%	0 in
11:30	44.2 °F	40.1 °F	30.4 in	Calm			85%	0 in
11:35	45 °F	40.5 °F	30.4 in	Calm			84%	0 in
11:40	45.9 °F	41.2 °F	30.4 in	Calm			84%	0 in
11:45	46 °F	40.6 °F	30.4 in	Calm			81%	0 in
12:15	46.6 °F	40.5 °F	30.4 in	Calm			79%	0 in
12:20	46.6 °F	40.6 °F	30.4 in	Calm			80%	0 in
12:25	46 °F	40.3 °F	30.4 in	Calm			80%	0 in
12:30	46.2 °F	40.5 °F	30.4 in	Calm			80%	0 in
12:35	45.7 °F	39.7 °F	30.4 in	Calm			80%	0 in
12:40	46.2 °F	39.9 °F	30.3 in	Calm			79%	0 in
12:45	46.2 °F	39.7 °F	30.3 in	Calm			78%	0 in
12:50	46.2 °F	39.4 °F	30.3 in	Calm			77%	0 in
12:55	46.6 °F	39.9 °F	30.3 in	Calm			78%	0 in
13:00	45.9 °F	39.4 °F	30.3 in	Calm			78%	0 in
13:05	47.5 °F	40.8 °F	30.3 in	Calm			78%	0 in
13:10	48 °F	40.8 °F	30.3 in	Calm			76%	0 in
13:15	48 °F	40.5 °F	30.3 in	Calm			75%	0 in
13:20	47.8 °F	39.7 °F	30.3 in	Calm			73%	0 in
13:25	46.9 °F	39 °F	30.3 in	Calm			74%	0 in
13:30	46.9 °F	39.6 °F	30.3 in	Calm			75%	0 in
13:35	47.8 °F	39.9 °F	30.3 in	Calm			74%	0 in
13:40	47.5 °F	39.6 °F	30.3 in	Calm			74%	0 in
13:45	47.5 °F	39.4 °F	30.3 in	Calm			73%	0 in
13:50	47.1 °F	39.4 °F	30.3 in	Calm			74%	0 in
13:55	47.7 °F	40.1 °F	30.3 in	Calm			75%	0 in
14:00	47.1 °F	39.6 °F	30.3 in	Calm			75%	0 in
14:05	47.7 °F	40.1 °F	30.3 in	Calm			75%	0 in
14:10	46.9 °F	39.6 °F	30.3 in	Calm			75%	0 in
14:15	47.1 °F	39.9 °F	30.3 in	Calm			76%	0 in
14:20	48 °F	40.5 °F	30.3 in	Calm			75%	0 in
14:25	48.4 °F	40.5 °F	30.3 in	Calm			74%	0 in
14:30	47.8 °F	39.9 °F	30.3 in	Calm			74%	0 in
14:35	47.5 °F	39.6 °F	30.3 in	Calm			74%	0 in
14:40	46.9 °F	39.6 °F	30.3 in	Calm			75%	0 in
14:45	46.9 °F	39.7 °F	30.3 in	Calm			76%	0 in
14:50	47.3 °F	40.1 °F	30.3 in	Calm			76%	0 in
14:55	47.3 °F	39.7 °F	30.3 in	Calm			75%	0 in
15:00	47.7 °F	39.7 °F	30.3 in	Calm			74%	0 in
15:05	47.7 °F	39.7 °F	30.3 in	Calm			74%	0 in
15:10	47.5 °F	39.9 °F	30.3 in	Calm			75%	0 in
15:15	47.1 °F	39.6 °F	30.3 in	Calm			75%	0 in
15:20	46.9 °F	39.4 °F	30.3 in	Calm			75%	0 in
15:25	47.1 °F	39.9 °F	30.3 in	Calm			76%	0 in
15:30	47.5 °F	39.9 °F	30.3 in	Calm			75%	0 in
15:35	47.3 °F	39.7 °F	30.3 in	Calm			75%	0 in
15:40	47.3 °F	39.7 °F	30.3 in	Calm			75%	0 in
15:45	47.3 °F	39.7 °F	30.3 in	Calm			75%	0 in
15:50	47.3 °F	39.7 °F	30.3 in	Calm			75%	0 in
15:55	47.1 °F	39.7 °F	30.3 in	Calm			75%	0 in
16:00	47.1 °F	39.7 °F	30.3 in	Calm			75%	0 in
16:05	46.9 °F	39.7 °F	30.3 in	Calm			76%	0 in
16:10	46.8 °F	39.6 °F	30.3 in	Calm			76%	0 in
16:15	46.6 °F	39.7 °F	30.3 in	Calm			77%	0 in
16:20	46.4 °F	39.6 °F	30.3 in	Calm			77%	0 in
16:25	46.2 °F	39.6 °F	30.3 in	Calm			77%	0 in
16:30	46.2 °F	39.6 °F	30.3 in	Calm			77%	0 in
16:35	46.2 °F	39.7 °F	30.3 in	Calm			78%	0 in
16:40	46.2 °F	39.7 °F	30.3 in	Calm			78%	0 in
16:45	46 °F	39.6 °F	30.3 in	Calm			78%	0 in
16:50	45.9 °F	39.4 °F	30.3 in	Calm			78%	0 in
16:55	45.9 °F	39.4 °F	30.3 in	Calm			78%	0 in
17:00	45.7 °F	39.2 °F	30.3 in	Calm			78%	0 in
17:05	45.5 °F	39 °F	30.3 in	Calm			78%	0 in
17:10	45.3 °F	38.8 °F	30.3 in	Calm			78%	0 in
17:15	45.1 °F	39 °F	30.3 in	Calm			79%	0 in
17:20	45 °F	38.8 °F	30.3 in	Calm			79%	0 in
17:25	44.4 °F	38.7 °F	30.3 in	Calm			80%	0 in
17:30	44.1 °F	38.7 °F	30.3 in	Calm			81%	0 in
17:35	43.7 °F	38.3 °F	30.3 in	Calm			81%	0 in
17:40	43.3 °F	38.3 °F	30.3 in	Calm			82%	0 in
17:45	43.2 °F	38.3 °F	30.3 in	Calm			83%	0 in
17:50	43 °F	38.1 °F	30.3 in	Calm			83%	0 in
17:55	42.8 °F	37.9 °F	30.3 in	Calm			83%	0 in
18:00	42.6 °F	37.8 °F	30.3 in	Calm			83%	0 in
18:05	42.4 °F	37.9 °F	30.3 in	Calm			84%	0 in
18:10	42.3 °F	37.8 °F	30.3 in	Calm			84%	0 in
18:15	42.3 °F	37.8 °F	30.3 in	Calm			84%	0 in
18:20	42.3 °F	37.8 °F	30.3 in	Calm			84%	0 in
18:25	42.3 °F	37.8 °F	30.3 in	Calm			84%	0 in
18:30	42.3 °F	37.8 °F	30.3 in	Calm			84%	0 in
18:35	42.1 °F	37.6 °F	30.3 in	Calm			84%	0 in
18:40	41.9 °F	37.8 °F	30.3 in	Calm			85%	0 in
18:45	41.9 °F	37.8 °F	30.3 in	Calm			85%	0 in
18:50	41.7 °F	37.6 °F	30.3 in	Calm			85%	0 in
18:55	41.7 °F	37.6 °F	30.3 in	Calm			85%	0 in
19:00	41.7 °F	37.6 °F	30.3 in	Calm			85%	0 in
19:05	41.7 °F	37.6 °F	30.3 in	Calm			85%	0 in
19:10	41.7 °F	37.6 °F	30.3 in	Calm			85%	0 in
19:15	41.5 °F	37.2 °F	30.3 in	Calm			85%	0 in
19:20	41.4 °F	37.2 °F	30.3 in	Calm			85%	0 in
19:25	41.4 °F	37 °F	30.3 in	Calm			85%	0 in
19:30	41.4 °F	37 °F	30.3 in	Calm			85%	0 in
19:35	41.2 °F	37 °F	30.3 in	Calm			85%	0 in
19:40	41.2 °F	36.9 °F	30.3 in	Calm			85%	0 in
19:45	41.2 °F	37 °F	30.3 in	Calm			85%	0 in
19:50	41.2 °F	36.9 °F	30.3 in	Calm			85%	0 in
19:55	41 °F	36.9 °F	30.3 in	Calm			85%	0 in
20:00	41 °F	36.9 °F	30.3 in	Calm			85%	0 in
20:05	41.2 °F	36.9 °F	30.3 in	Calm			85%	0 in
20:10	41.2 °F	37 °F	30.3 in	Calm			85%	0 in
20:15	41.2 °F	37 °F	30.3 in	Calm			85%	0 in
20:20	41.2 °F	37 °F	30.3 in	Calm			85%	0 in
20:25	41.2 °F	36.9 °F	30.3 in	Calm			85%	0 in
20:30	41 °F	36.9 °F	30.3 in	Calm			85%	0 in
20:35	40.8 °F	36.7 °F	30.3 in	Calm			85%	0 in
20:40	40.8 °F	36.7 °F	30.3 in	Calm			85%	0 in
20:45	40.6 °F	36.1 °F	30.3 in	Calm			84%	0 in
20:50	40.6 °F	36.1 °F	30.3 in	Calm			84%	0 in
20:55	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
21:00	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
21:05	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
21:10	40.6 °F	36.1 °F	30.3 in	Calm			84%	0 in
21:15	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
21:20	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
21:25	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
21:30	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
21:35	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
21:40	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
21:45	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
21:50	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
21:55	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
22:00	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
22:05	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
22:10	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
22:15	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
22:20	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
22:25	40.8 °F	36.3 °F	30.3 in	Calm			84%	0 in
22:30	40.6 °F	36.1 °F	30.3 in	Calm			84%	0 in
22:35	40.5 °F	36 °F	30.3 in	Calm			84%	0 in
22:40	40.3 °F	35.8 °F	30.3 in	Calm			84%	0 in
22:45	40.1 °F	36 °F	30.3 in	Calm			85%	0 in
22:50	40.1 °F	36 °F	30.3 in	Calm			85%	0 in
22:55	40.1 °F	36 °F	30.3 in	Calm			85%	0 in
23:00	39.9 °F	36 °F	30.3 in	Calm			85%	0 in
23:05	40.1 °F	36 °F	30.3 in	Calm			85%	0 in
23:10	39.9 °F	36 °F	30.3 in	Calm			85%	0 in
23:15	39.9 °F	36 °F	30.3 in	Calm			85%	0 in
23:20	40.3 °F	36.3 °F	30.3 in	Calm			86%	0 in

Οριοθετημένο αρχείο με ,

Oraiokastro GR

Με τη συνεργασία του: Weather Underground - 2 mb

Vantage Pro2™ Ασύρματο Μετεωρολογικό Σταθμό