You're doing it wrong...
First, I'd say it's not worth monitoring temperature fluctuations on a hyper-efficient server like an HP ProLiant Gen8. A DL380p Gen8 has 50 temperature sensors!! The only thing you need to control is your ambient temperature environment.
If you're just concerned about high-temperature conditions, the server can just email you. But if you must see this during high loads, you can.
You'll want to measure this from the OS directly, the System Management Homepage (at port 2381), through SNMP, through the ILO or even the ILO via SNMP.
HP servers have management agents available to the operating system (I'll fill in details once you post the OS you're running)...
For instance, in Linux, using the HP Management Agents:
# hplog -t
ID TYPE LOCATION STATUS CURRENT THRESHOLD
1 Basic Sensor Ambient Normal 62F/ 17C 107F/ 42C
2 Basic Sensor CPU (1) Normal 104F/ 40C 158F/ 70C
3 Basic Sensor CPU (2) Normal ---F/---C 158F/ 70C
4 Basic Sensor Memory Board Normal 77F/ 25C 188F/ 87C
5 Basic Sensor Memory Board Normal 75F/ 24C 188F/ 87C
6 Basic Sensor Memory Board Normal 78F/ 26C 188F/ 87C
7 Basic Sensor Memory Board Normal 80F/ 27C 188F/ 87C
8 Basic Sensor Memory Board Normal ---F/---C 188F/ 87C
9 Basic Sensor Memory Board Normal ---F/---C 188F/ 87C
10 Basic Sensor Memory Board Normal ---F/---C 188F/ 87C
11 Basic Sensor Memory Board Normal ---F/---C 188F/ 87C
12 Basic Sensor System Board Normal 95F/ 35C 140F/ 60C
13 Basic Sensor System Board Normal 111F/ 44C 221F/105C
14 Basic Sensor Pwr. Supply Bay Normal 71F/ 22C ---F/---C
15 Basic Sensor Pwr. Supply Bay Normal 71F/ 22C ---F/---C
16 Basic Sensor Pwr. Supply Bay Normal 73F/ 23C 167F/ 75C
17 Basic Sensor Pwr. Supply Bay Normal 82F/ 28C 239F/115C
18 Basic Sensor Pwr. Supply Bay Normal 71F/ 22C 239F/115C
19 Basic Sensor Pwr. Supply Bay Normal 78F/ 26C 239F/115C
20 Basic Sensor Pwr. Supply Bay Normal 80F/ 27C 239F/115C
21 Basic Sensor Pwr. Supply Bay Normal 77F/ 25C 239F/115C
22 Basic Sensor Pwr. Supply Bay Normal 78F/ 26C 239F/115C
23 Basic Sensor Pwr. Supply Bay Normal 80F/ 27C 194F/ 90C
24 Basic Sensor Pwr. Supply Bay Normal 71F/ 22C 194F/ 90C
25 Basic Sensor System Board Normal 152F/ 67C 212F/100C
26 Basic Sensor System Board Normal 86F/ 30C 194F/ 90C
27 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
28 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
29 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
30 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
31 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
32 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
33 Basic Sensor I/O Zone Normal ---F/---C 212F/100C
34 Basic Sensor I/O Zone Normal 75F/ 24C 149F/ 65C
35 Basic Sensor I/O Zone Normal 77F/ 25C 150F/ 66C
36 Basic Sensor I/O Zone Normal 77F/ 25C 150F/ 66C
37 Basic Sensor I/O Zone Normal ---F/---C 149F/ 65C
38 Basic Sensor I/O Zone Normal ---F/---C 149F/ 65C
39 Basic Sensor I/O Zone Normal ---F/---C 149F/ 65C
40 Basic Sensor I/O Zone Normal 82F/ 28C 150F/ 66C
41 Basic Sensor I/O Zone Normal ---F/---C 150F/ 66C
42 Basic Sensor Pwr. Supply Bay Normal 71F/ 22C 203F/ 95C
43 Basic Sensor System Board Normal 100F/ 38C 194F/ 90C
44 Basic Sensor System Board Normal 80F/ 27C 176F/ 80C
45 Basic Sensor System Board Normal 59F/ 15C 149F/ 65C
46 Basic Sensor System Board Normal 82F/ 28C 167F/ 75C
47 Basic Sensor System Board Normal 78F/ 26C 167F/ 75C
48 Basic Sensor System Board Normal 84F/ 29C 167F/ 75C
49 Basic Sensor Chassis Normal 80F/ 27C 167F/ 75C
50 Basic Sensor Chassis Normal 84F/ 29C 167F/ 75C
Or a view of the System Management Homepage:

